I'd rather cut off my scrotum with a rusty breadknife than AP slots in Vegas or AC.

If you're going to do it for any kind of real profit you need to play high denom/risk plays on games (as crimm said) that the general ding dongs don't know about. Building cards off the plays is also pretty valuable, but higher denom plays carry W2G possibilities which can be an issue.

Any widely known play is going to be a race to the bottom and if you aren't card building you're going to have every play taken by teams who are.

You are seriously 15 years late to the party. How you didn't transition from your VP sideplay to slots back in the day is seriously beyond me.