I think the game should be 100% free for the first 8~12 hours of gameplay regardless of the platform.

Then again i'm sure there's a reason GS didn't do that and instead went with a dollar for an extra 8 hours of game-time, but I'm curious and going to ask anyways. :P

*Edit looks like i should have a bit more research but so far I still can't find anything about 8 free hours anywhere.

The Android version also has a single-player "free-play" mode, aside from the extended trial. I don't think the current $0.99 is unreasonable. But, thanks for the feedback.

Doesn't the android market have a refund policy as well?

Since Google reduced it to 15 minutes, there basically is no refund policy. I mean, a user can't even download the game in that time.