Did someone of you try to do Arbitrage on sport bets in BTC gambling sites?
Some years ago i checked some sites and it wasn't possible (house edge was too big, bigger than the house edge in traditional sportbook sites).
Maybe something is changed in the last years?
Nope, it's still the same old.
There are very rarely any worthwhile opportunities, and if there are, they are generally caused by some sort of inefficiency in the markets that you cannot actually take advantage of safely and profitably. For instance, if a sportsbook has low limits, high withdrawal requirements etc., you wouldn't be able to take advantage of arbs even if the odds at this particular sportsbook are great.
I wouldn't waste time on it honestly. But if you want to try, you can sign up to BitEdge for free. I signed up a while back and basically you would receive free updates on arb opportunities whenever they come up.