Thought I would share my success, just finished first at 2.20$ SAT special bounty builder tournament! Total prize was 909$!

Question tho, when we were heads up, I already had cashed for 272$ in bounty's + 300$ 1st place/2nd place finish guaranteed, but when I knocked out my opponent I got extra 300$ in bounty, even tho his bounty was only 27$. So those 300$ comes from pokerstars ? Bit confused as this is my first bounty builder 1st place finish!