If you're betting for fun the ML and other standard bets would be more fun as you get the sweat. However if you're looking to make steady profits and use this as a side gig then its certainly worth looking into.
Can you list in the OP what casino you are using to do the arbitrage bet without encountering problem in the casino? Most of crypto casino is vigilant on detecting all users that using this kind of strategy that’s why it’s the only risk to this method for a small profit margin on a normal size bankroll.
I’m interested to know what kind of casino you are using and if it’s possible for me to create an account this casino to this arbitrage bet without encountering any problem.