Are the prizes cumulative? In other words, if the player on the button gets 9 Banks, does he win 50 or 150 pounds?
Nope, you only get the one prize, if the streak ended at 9 banks, you get paid £100.
This sounds like the house funds this? At some jackpot level, depending on minbet and players, it becomes profitable to play though if you're in the wrong seat or full table that sucks. If you have the button at 11 bankers, then 12 bankers happens next hand for a different player, do you still get 500?
The button won't move until the Banker streak ends, or if the punter decided not to place a bet, in which case everything resets from scratch.
One of the managers was saying every time the dealer inserts a B or P decision into the computer/score board the pot increments, hence the £31k, he also said they paid out £38k a while back. It used to be, whoever got the longest banker streak for the week took it all, now they have those smaller payouts for 8 banks and any 12 banker streak takes all, no more waiting until midnight Sunday.
Just wanted to add, if you ever get to 11 Bankers, with the current payout, ensure you have a spare £2350 on you, or able to borrow it from other players. Because sitting on 11 bankers is like a free bet, you would load up on all opposing bets, table max £2000 on the Player, table max £250 on the Tie (paying 9-1) and table max £100 on UR way Tie.
UR Way Egalite outlined here; https://wizardofodds.com/games/baccarat/side-bets/egalite/