US developer MobilityWare says it's making more than $10,000 a month in ad revenues from its Word Warp iPhone game.
The company is using ad network Greystripe's platform to sell ads in the free version of the game, which has so far been downloaded by more than 1.5 million players.
Marketing director Dave Yonamine tells TheAppleBlog that the game is achieving an eCPM rate of $1.91, helping to make back (and more) its "mid five figures" development costs.
Word Warp has been available on Apple's App Store for more than a year, but is still being downloaded thousands of times every day according to Yonamine.
"I find it humorous that people say the ad-support model is flawed," he says.
Free iPhone games are hugely popular: Fishlabs announced this week that the Waterslide Challenge game it made for Barclaycard has passed three million downloads, for example.
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However, many developers remain suspicious of the ad-supported model. Greystripe, and rivals like AdMob, are doubtless pulling out all the stops to get more successful case studies like MobilityWare out in the open.
