I noticed there is a lot more BTC bets being made
You missed to factor in the bankroll size.
Looking at the last 30 days here and ignoring the difference in house edges:
3,524.31687260 BTC wagered over a bankroll of 1,566.32812187 (225%)
40,667.22567746 ETH wagered over a bankroll of 20,970.66687673 (194%)
Anyway, ETH gambling on the site seems slow, so I'm not seeing much in terms of a return. I'm sitting at about .43%
That sounds awesome. If my math isn't off, you're looking at a 53% profit yearly with compounding there.
(Assuming 3 days for the 0.43%, calculated over 300 days).