+1. It was easy to do back several years ago. Get a nice bonus, play strict basic strategy, bet the smallest bet you could so that probabilities are achieved (yes, that takes quite a bit of time to do), cash in when have achieved rollover (easy when neteller was available). Did this 36 times with quite a few different casinos/sportsbooks and won at 34 of them. Only one loss for the full amount of the buy in and the other loss was for $26 as i cashed in when rollover was completed and didn't lose the whole buy in. Sure do miss neteller!!I made a small fortune bonus whoring online blackjack.
I mentioned this before a few times on the forum, but I turned $2700 into $20k on Bodog back in the early 2000s - had my (then) gf put a password on the computer's bios so I couldn't get on while they processed a partial payout, but two days later I convinced her to give it to me and I lost almost all of it. Cashed out for something in the high $3000s. Had my "lucky day" and completely blew it.