http://www.pocketgamer.co.uk/r/iPhone/Okay%3F/news.asp?c=63915 You can pay nothing or pay something for the game, this is amazing.
Doubtful on best F2P payment since you can do that with most F2P apps anyway. How do you think some of the revenue from them come?? - by numerous transactions over time.
Good luck with that. People don't even want to pay for AAA experiences if they don't have to so can't see this working preying on people's "generosity". Coz 99.99% of people don't have any of that, sadly.