Currently running promotion(Cryptocurrency users only):
"If you deposit at least 0.25BTC(or the equivalent in other altcoins) your first bet is a "safe-bet",this meaning you get 50% back if your first bet loses.Minimum odds are 1.6 for singles or 2.4 for parlays."
Cheers,Marcus.
Have you considered giving away from free coin or having a bonus for smaller deposits? Many people wouldn't be willing to risk 500 USD on a new site that no one has left reviews on before. Yes, you have a fiat side, but you'll still be treated like a new site if you weren't very popular. Your book seems very shady, especially given the odds.
Our Odds for the semi-finals of Wimbeldon:
S.Querry (3.65) vs M.Cilic (1.38)
R.Federer (1.20) vs T.Berdych(6.50)
@1.2/@6.5 has negative juice for the player. An arbitrage bet just between your book would net 1.3% profit. @3.65/@1.38 is also negative juice for the player, with a net of 0.1% when an arbitrage bet is made.
I didn't verify that these are the odds listed, but I don't see why you'd lie about them.