I don't remember how many my longest winning streaks on 50% winning chance. I didn't care actually since i never looking for to hit many greens on that win chance.
Did you used reverse-martingale when you got that 9 long winning streaks?
That would be a huge win if he stopped on that 9 win. Though I tried to use this reverse-martingale and the consecutive win that I get is at most 5 and lost on the 6th roll. Though in a normal bet with 50% winning chance, I can recall a winning streak of 12.