Highlights
- The One Game Studio used ByteBrew’s Ctrl AI to instantly optimize cross-promotion, achieving a 200% Day 1 ROAS.
- The AI-driven engine bypassed "cold start" challenges, slashing CPI to $0.04 while accurately routing high-value players.
- This strategy boosted ad LTV by 1.26x and outperformed traditional acquisition through superior, predictive user targeting.
Hanoi-based mobile publisher The One Game Studio has unlocked the kind of immediate profitability that most developers only dream of. By integrating a new AI-powered cross-promotion network called ByteBrew Ads into its monetization strategy, the studio hit a massive 170% Day 1 Return on Ad Spend (ROAS) globally. Achieving pure profit from the very first day of a campaign is a rare feat in today's competitive mobile gaming market, but by seamlessly routing high-value players between its own games, the studio managed to completely bypass the steep costs of traditional user acquisition.
Behind this massive jump is a relatable challenge. The One Game Studio boasts a portfolio of over 70 casual, puzzle, and music games, supported by a growing team of more than 60 employees. Located in Vietnam, a booming hub for mobile game publishing, the studio had a highly engaged global audience, but those players were heavily concentrated in a handful of top-of-funnel hit titles.
Because 95% of the studio's revenue comes from advertising, moving players into their higher-earning destination games is reportedly incredibly risky. If they moved the wrong players, they would cannibalize their existing ad revenue. Traditional user acquisition channels simply couldn't solve this delicate balancing act, as per Pocketgamer. biz.
Eliminating the "Cold Start" With Ctrl AI
To fix this bottleneck, The One Game Studio deployed ByteBrew Ads to augment its existing ad mediation setup. The secret weapon here is Ctrl AI, a predictive engine that evaluates each ad opportunity in real time. Most ad networks require lengthy, expensive optimization periods to figure out what works. Ctrl AI, however, is already pre-trained on petabytes of live app data, completely eliminating the dreaded "cold start."
It instantly predicts both a user's value and the opportunity cost of moving them out of the source app, accurately identifying the highest-value players and pointing them toward the most lucrative games in the studio's catalog. This routing is further enhanced by Alt, ByteBrew's AI Vision engine, which ensures every user sees the specific creative most likely to make them click.
The data from this shift reveals an immediate, compounding success for the entire portfolio. The studio managed to acquire users across more than 100 countries at a remarkably low average Cost Per Install (CPI) of just four cents. This AI-driven strategy proved to be up to 2.5x more efficient than open-market acquisition, even in the most expensive geographical regions. In those premium markets, the acquisition costs were so incredibly low that the studio saw a 200% return on ad spend by day one, a stark contrast to traditional paid campaigns that often fail to recover costs by day seven.
ByteBrew's
Maximizing Ad Lifetime Value (LTV)
Furthermore, the users routed by the AI were incredibly valuable. They produced a 1.26x lift in ad Lifetime Value (LTV) and generated a 1.4x effective cost per mille per impression in their new destination apps. They also stuck around, retaining at 1.6x the destination game's blended day-one rate. Ultimately, for every unit of ad value the AI targeted in the source game, the destination generated a 1.7x increase in new ad value globally on the first day, climbing to a 1.85x return by day seven, as per Pocketgamer.biz.
Duong Tran, the marketing lead at The One Game Studio, noted that these rapid results surprised even their own team, calling it the exact outcome every publisher hopes for. Tran explained in a ByteBrew case study that smart, AI-powered cross-promotion helped the team unlock value that traditional channels simply could not deliver as efficiently.
In the highly competitive mobile gaming space, he emphasized that growth comes from continuous testing, reminding developers that they must test, learn, iterate, and test again to find their next big breakthrough.

