That is why you read what sub-forum it is under. Also, last I checked, nobody calls the App Store the "market".
Well I (and probably most users) don't read the sub-forum at first glance. All they probably see is "Angry Birds" and "Free". Yeah the market was a big giveaway that it wasn't the App Store.
They said "no intention of releasing...oh wait that was microsoft, man this game is awesome, but something is different...?
Android=Google Windows Phone 7=M$ The developers were furious at M$ for saying that they will be released Angry Birds for Windows Phone 7, when they had no intention at all to do it.
Yeah, you're also privileged to not having any more updates! If it's the same as the iPhone version, it's about 24mb. Android apps have a 25mb limit.
The only catch to making Angry Birds free was the placed ads within the app. This doesn't bother me at all considering how addicting the game is.