Not sure what your first question is asking but I think I get part of it, people have to post their adress with their guess in their post.
I'm saying you'll have no idea if that's actually the person or not. Let's say someone is watching 15MtpxHe6BBXPRaEFZCW971bKcny8BYWvD for payments at blockexplorer. They notice someone bought a ticket. They then go the the forum and say it was theirs. The rightful buyer also claims it's theirs. You have no idea who it actually was. Even with no one watching depending on how many players you won't know if they actually paid or not. You'll only know the total amount of players. Asking them what address they sent from won't work either. They could look it up at blockexplorer or they actually may not know. Sometimes the address it was sent from will be totally unknown to the player.
I had no intentions of playing the game myself. But if questions are going to be raised I guess I can film it. Though I had planned on doing way more of these once I got them off and that would be tiddus. I still can though....
Doesn't really do anything. Just re-do it until you get what you want. You have to get numbers from somewhere beyond your control.
I will buy the BTC for the winner I currently don't have any. My "profit" will be from the idea that 60 people can't post before 3 pages.
So if only a couple people buy a ticket and they beat the odds and win you are prepared to spend over 3,000 USD to pay the winner? I'm VERY skeptical now. Chances are no one will win. You may get a some BTC before you have to pay anything back. If that day comes where you do have to pay though, how can people know you won't find it easier to just to disappear rather than spend thousands!!