From what I gathered when I played, if you Max Bet and get to a cast member's bonus round, you will win all prizes including their progressive (as with max bet, you get to pick all the choices in that person's bonus game). What I didn't like from the several casinos I've seen this at is the amount of a max bet. At O'Sheas it was $3, Imperial $4 and Harrah's Joliet and Saint Louis was $6...yikes.
Can the frequency of bonus rounds be changed (within a certain legal range) depending on what the casino chooses for the max bet? Like maybe at $3 O'Sheas you don't get to the bonus round as often?