I often see sites make these claims but there is little to prove it usually.  Your site is giving me an error at the moment so I can't research too much, but have any 3rd party reviews been done to ensure the games are provably fair?  Does your site have a section that shows users how to verify the results of the games?  I think it's great that Bitcoin can provide such transparency, but from experience there are very few who actually use it to be as transparent as they could be.