I've been playing NimbleBit's freemium Pocket Frogs game since it was released last week, and apparently I'm not the only one -- Ian Marsh tells TUAW that the game has been downloaded by half a million people so far. The company is also seeing 200K daily active users, and while Marsh couldn't share exact stats on how many people have taken advantage of the game's in-app purchases, he estimates that 3-9% of the player base have bought stamps or potions in the game.
Over on Twitter, he says that the 99 cent charges are the most common, making up half of the total purchases. But the $29.99 optional charges make up 8% of the purchases, and actually contribute to 49% of total revenue. In other words, just a few pe
