Why do you want to bet on a site which looks not very professional and honest when there are money fair prooven sites?
This does not make sense for me. However, if you want to try the site you should set little amounts and look whether it is fair or not.
I came across a pretty new gambling game called
www.bitcoinbetting.website in another thread. They seems to be on chain and using the last digit of a block hash as random number. Have anyone here tried this so far ? Would like to have some feedback before I start playing there.