So, on Stinkin' Rich, I played 2 lines times 3, or 6 cents and I got the Keys To Riches bonus. In the Bonus, the rich older woman came in a row and she is worth $100 as a base. I was playing times 3, so she was worth $300 alone. The Bonus netted me $347 on a 6 cent bet! Definitely my best hit ever! Over 5,000 times my bet!
Edit. By volume, my best hit was actually another Stinkin' Rich , $384 on a .20 bet, more money and 1,920 times my bet but by perspective, the $347 on a 6 cent bet is better. (Roughly 5,783 times my bet.)