I opened some weeks ago this post asking for some update about "sure bets" but actually there is not any resource suitable for btc
https://bitcointalksearch.org/topic/--5284297
Wanting to profit is not bad, we gamblers also want to make money through gambling, maybe get lucky and win the jackpot. Like some individuals out there who profited a lot and earned millions. The competition must be fair and give and take. We are risking our money. So a small way to atleast gain profit through arbitrage should be allowed. Anyway, i'm sure platforms doesn't restrict this. I've seen users experimenting which bookies has best odds. I guess just to be safe read their TOS.