For god sake, please don't even consider donating this person, he intended to sell his server which was downloaded and run.
Regarding to this huge successfuly mega project, he just made something VERY similar to this (anyone who played his server, can confirm it):
I've made it with paint within few minutes, but his "landing page" website actually looked like this. You created an account, login, create character and download client + donate while you are visiting website. That's what were these 3-5 buttons for.
Come on, just don't waste your money and time on this guy. He should be literally blacklisted on OTLand.