Really? Have you played on that checking the site popularity https://www.alexa.com/siteinfo/chain-bet.com#trafficstats it's not really a popular gambling site but it's a three year old gambling site it seems they lack promotion first time I read site. but it's hard to win on that site guessing,  What would be the last digit of the block hash that includes your transaction because I saw a lot of losing bet if the transaction is really true.