Thanks for letting us know this does not sound good and to be honest just sounds like not very good excuses not to pay, op your site has been up awhile and if it is provably fair what could possibly be the problem of his wins being 'exceptionally strange' could you give more details please/?
Software bug, crypto weakness, rules implementation...dont know yet. Provably fair system doesnt mean its hacker proof system.
Yes, site has been up awhile but this guy is first who is somehow able to consistently multiply his deposits ten times and eventualy ruin whole game.
I stoped the site until it will be solved. I will deal with this asap.
If someone actually win at your site, it doesnt always means that the person actually doing a fraud way to win, if you are the admin of the site, you can easily verify this by looking at his previous game and determine if he indeed had used a fraud way to win, The house doesnt always win
and also provably fair isnt a hacker proof system, it is a system that prevent the house to cheat