When I first started working on monetization for mobile games, I thought all ads were created equal. Banners, interstitials, rewarded videos—they all brought in revenue, right? Then I ran the numbers on a puzzle game we were consulting for. Rewarded videos generated 4x the eCPM of banners and had positive user sentiment scores. Interstitials had the opposite: decent eCPM, terrible sentiment, and measurably hurt retention.
That's when I became a rewarded video evangelist. When done right, rewarded ads are the rare win-win in mobile monetization: users get value, advertisers get engaged viewers, and publishers get premium revenue.
Why Rewarded Video Works
Rewarded video succeeds where other ad formats fail because of one fundamental difference: user choice.
The Psychology of Opt-In
When users choose to watch an ad in exchange for a reward, several psychological mechanisms activate:
- Control: Users feel in control of their experience
- Exchange: The reward creates a fair value exchange
- Attention: Voluntary viewing means genuine attention
- Positive association: The reward creates positive feelings around the ad
The Numbers Don't Lie
Rewarded video outperforms other formats on nearly every metric:
- eCPM: 2-4x higher than interstitials, 10-20x higher than banners
- Completion rates: 70-90%+ (users want the reward)
- User sentiment: Positive or neutral (vs. negative for interstitials)
- Retention impact: Neutral or positive (vs. negative for forced ads)
Placement Strategy: Where to Put Rewarded Ads
The placement of your rewarded video opportunities determines engagement rates, revenue, and user experience. Here are proven placements by category:
Extra Lives / Continues
After failure, offer a second chance in exchange for watching an ad. This is the highest-converting placement because users are emotionally invested and close to success. Typical engagement: 30-50% of eligible users.
Currency / Resource Multipliers
Double or triple rewards earned from completing a level or activity. Works because users already earned the base reward—the multiplier feels like a bonus. Typical engagement: 40-60%.
Daily Rewards Enhancement
Upgrade daily login rewards by watching an ad. Great for DAU and daily engagement rituals. Typical engagement: 50-70% of daily active users.
Skip Wait Timers
Allow users to skip energy regeneration or build timers. Careful here—this can cannibalize IAP if your economy depends on time gates. Typical engagement: 20-40%.
Premium Content Access
Unlock characters, levels, or features temporarily through ad views. Good for converting non-payers and demonstrating premium value. Typical engagement: 15-30%.
The Natural Integration Rule
The best rewarded video placements feel like part of the game, not interruptions. Ask yourself: "Does this placement make sense in the game's context?" A continue after losing makes sense. A random popup doesn't.
Reward Value Calibration
The reward you offer must be valuable enough to motivate watching, but not so valuable that it undermines your economy:
The Value Equation
Reward value should approximately equal:
- 30-60 seconds of user time (ad length)
- 5-15 minutes of typical gameplay progress
- 10-20% of lowest IAP package value
Dynamic Rewards
Sophisticated apps vary rewards based on context:
- Higher rewards for first-time viewers (hook them)
- Increasing rewards for consecutive viewing (streaks)
- Contextual scaling based on game state (bigger rewards at harder levels)
- Diminishing returns for excessive daily views (prevent exploitation)
Reward Types That Work
- Soft currency: Low risk, broad appeal
- Consumable items: High perceived value, limited impact
- Time-limited boosts: Valuable but doesn't accumulate
- Exclusive cosmetics: For engaged players seeking uniqueness
Frequency and Caps
Even with opt-in ads, too many opportunities can fatigue users and devalue rewards:
Recommended Caps
- Per session: 3-5 opportunities maximum
- Per day: 10-15 views maximum
- Per placement: Varies by context (continues may have no cap; daily rewards should be once)
Cool-Down Periods
After watching a rewarded video, implement cool-down periods before the same placement is available again:
- Continues: Available each time (no cool-down)
- Multipliers: Once per level/session
- Free resources: Every 15-30 minutes
Technical Implementation Best Practices
Pre-Loading
Always pre-load rewarded videos in the background. Nothing kills conversion like a "loading..." spinner when users are ready to watch. Request new ads during:
- App launch
- Level transitions
- After ad completion
- Any natural pause in gameplay
Availability Checks
Before showing rewarded video buttons, verify that an ad is actually available. Showing an option that fails when tapped damages trust and frustrates users.
Completion Verification
Grant rewards only after verified completion. Use server-side verification when possible to prevent cheating. All major ad networks provide completion callbacks.
Graceful Failures
When ads fail to load or play:
- Hide the rewarded video option (don't show broken buttons)
- Offer alternative actions when possible
- Log failures for debugging
- Consider fallback networks
The Fill Rate Factor
No single ad network has 100% fill rate. Use mediation to stack multiple networks and maximize availability. If Network A doesn't have an ad, Network B might. Fill rates of 95%+ are achievable with proper mediation setup.
Mediation and Waterfall Optimization
Mediation platforms manage multiple ad networks to maximize fill rate and eCPM:
Major Mediation Platforms
- ironSource (Unity): Strong for gaming, good eCPMs
- AppLovin MAX: Excellent optimization, large network
- Google AdMob: Easy integration, good for starters
- Fyber: Strong programmatic, header bidding
Waterfall vs. Bidding
- Traditional waterfall: Networks called in order of historical eCPM. Simple but leaves money on the table.
- In-app bidding: Networks compete in real-time auction. More complex but typically 10-30% higher revenue.
- Hybrid: Bidding networks compete first, waterfall handles the rest. Best of both worlds.
Network Selection
Include 5-10 networks in your waterfall:
- Tier 1 (highest eCPM): Meta Audience Network, Google AdMob, Unity Ads
- Tier 2: Vungle, AppLovin, ironSource
- Tier 3 (fill rate focus): Mintegral, Chartboost, InMobi
A/B Testing Your Rewarded Strategy
Never assume—always test. Key experiments to run:
Placement Tests
- Which placements drive highest engagement?
- Do certain placements cannibalize IAP?
- What's the optimal number of placements?
Reward Value Tests
- Does higher reward value increase engagement proportionally?
- What's the minimum viable reward that still converts?
- Do dynamic rewards outperform static ones?
UI/UX Tests
- Button placement and prominence
- Messaging and value proposition clarity
- Visual design of reward previews
Frequency Tests
- Impact of different daily caps on revenue and retention
- Cool-down period effects on engagement
- Session-based vs. time-based limits
Balancing Ads and IAP
The eternal question: Do rewarded ads cannibalize in-app purchases?
The Research Says...
Studies consistently show that well-implemented rewarded video increases overall revenue without significantly impacting IAP:
- Non-payers (95%+ of users) contribute ad revenue they otherwise wouldn't
- Payers often ignore ads (they'd rather pay than watch)
- Rewarded ads can actually introduce users to premium features, increasing IAP conversion
Segmentation Strategy
Advanced apps segment users and adjust ad frequency:
- Non-payers: Full ad experience, maximize ad revenue
- Light payers: Moderate ads, don't compete with small purchases
- Whales: Minimal or no ads—don't annoy your best customers
The "Remove Ads" IAP
Offering a "remove ads" purchase can boost IAP revenue while serving as a natural segmentation tool. Users who hate ads self-select into paying. Price it at $2.99-$4.99 for one-time removal, or include it in premium subscriptions.
Measuring Success
Key metrics to track for rewarded video optimization:
Engagement Metrics
- Offer rate: How often users see the rewarded video option
- Engagement rate: % of offers that result in ad starts
- Completion rate: % of started ads watched to completion
- Ads per DAU: Average ads watched per daily active user
Revenue Metrics
- eCPM: Revenue per 1,000 impressions
- ARPDAU: Average revenue per daily active user
- Ad revenue share: % of total revenue from ads
- Fill rate: % of ad requests that return an ad
User Impact Metrics
- Retention by ad exposure: Does watching ads correlate with retention?
- Session length by ad exposure: Do ads extend or shorten sessions?
- IAP by ad exposure: Does ad watching correlate with purchasing?
Common Mistakes to Avoid
- Forcing ads: The moment ads feel mandatory, you've lost the rewarded advantage
- Deceptive rewards: Showing one reward and delivering another destroys trust
- No availability check: Broken buttons frustrate users
- Overwhelming frequency: Even opt-in ads fatigue at high volumes
- Ignoring payer segmentation: Whales shouldn't see the same ad load as non-payers
- Poor integration: Ads that interrupt natural flow feel forced
- Single network reliance: Always use mediation for better fill and eCPM
That puzzle game I mentioned at the start? After optimizing their rewarded video strategy—better placements, proper reward calibration, mediation optimization—their ARPDAU increased 35%. User sentiment actually improved because we removed intrusive interstitials and replaced them with optional rewarded videos. Revenue up, users happier. That's the magic of rewarded ads done right.
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