I'm pretty confused about people talking about house edge increasing or decreasing here. The more you bet, the more edge you give up. How you bet doesn't matter. If you want to give up the lowest edge while having a chance to win something decent, do small bets with small odds to win.
If you will win they will take 5% from your winning and if you will loss you will loss 100% of your bet amount. So in both way casino will take some profit from you in a form of house edge.
Freebitco.in still have really high house edge compared to what other casino offers around 1%.