@dooglus that wouldn't work for our site, as the members do not wait to wait 5 mins to find out if they win. Do you have any other suggestion?
Well, so long as the calculation takes longer than the game I think it's OK. Most games are what, 30 seconds or less?
Maybe your members don't care if the game isn't provably fair. That's fine too. Just don't advertise it as provably fair when it isn't.
After the last person buys a ticket, its 10 seconds till the game grabs a hash from blockchain. But the timer can be reset at anytime up until the last second.
Could you explain how we could do it any different besides taking 5 mins to pick a winner?
Also the only claim to us not being provably fair is the house doing transactions, you can check any of the hashes used. most the time its in the $1000s i have even seen a 1.2 million dollar transaction i don't think anyone is going to send 1.2 million USD to rig a game where you make $0.04 lol
But we see your point where even if it is not economically profitable, and extremely hard to do there still is that chance.
I hope to see you give us a better idea soon.