Hey, I literally made an account just to reply to this topic. YES. IT WORKS. CAN CONFIRM.
Banged my head on the wall of gambler 8 for about two hours, then read the post about switching up the bets. Going from 2 cents to 30 cents got me two out of the three 5 card wins in about 10 minutes after hours of bugger all.
Working on number 3 now, but it's something to do with the mechanic. "Oh you're making a play, huh?" From one of the other players happened both times, and both were 5 card 21s.
Ps, another tactic that worked well for the third win was sitting on the far right seat and exiting the blackjack table the second I didn't get the five cards, then joining the game again. You're the first player dealt so it skips everyone else's turn that way.