On the website:
When a round starts, the 3 winners of that round are chosen. The source of the winning ticket numbers is random.org, which uses ambient atmospheric signals to generate random numbers. The winning tickets are converted to an tiger192,4 hash, and the winning ticket string for the last round released after it ends. This enables you, the user, to verify that we, the operators, aren't monkeying around!
Your site claims that the hash can be used to verify you "aren't monkeying around". I've tried asking about the details about picking the winner but I haven't got a reply yet. My main concern is that the hash info is kind of deceptive. It doesn't really prove anything at all but gives the illusion that it's somehow making it so you can't cheat. I'm not accusing you of cheating but the claim on the website is in my opinion false.
Since I haven't got a reply, I'll guess what's happening:
-you get random data to say who wins, hash it, release hash, then people play, then you pay, then you release random data
The main problem is that in this case, releasing the hash does nothing. It doesn't prevent you from playing your own game to win. In fact, it just proves you know what ticket will win before hand and you just have to buy it at the right time to win and no one will know.
Really, the only way to prove you "aren't monkeying around" is to have a method by which the winner is determined by a method that's beyond your control and that others can check for themselves. Otherwise they just have to trust that you doing what you claim and have faith in your honesty and that you aren't cheating.