I like the site but then provably fair is NOT fair. As NLNico mentioned in another thread:
3 ) some others do not allow you to change your client seed so they force a client seed that makes the result known to them even before you bet.
Thats you. What happens on your site is that I pick a client seed, press randomize. The seed gets sent to you and you can set a new server seed depending on my client seed, so you can actually affect if I win or not!
The proper way to implement this would be to allow the player to change the client seed WITHOUT changing the server seed.
Otherwise great site.