it really hurt when I worked on the bounty program until it ended,
and the prize was not given to me, yes it was the most painful experience I have received,
but I am not easy to give up, I am still trying my luck at the bounty.
I know how you feel, i had the same experience, and more than once. For those bounty projects i don't get my pay, my method was blacklisting the bounty manager, maybe some are not manager fault, but i still don't want to work with them. I don't give up too.
Everybody will face the same experience with the bounty, even the manager has good experience towards researching, but sometimes fail to find the best company and this makes many bounty hunters not even getting any value to work done by them for more than 3 months. That's why we should be very careful when choosing any bounty for working.