I'm very sure how the bounty tokens will be distributed have been clearly stated on the bounty thread but for more explanation, in any bounty campaign, it is subdivided to different campaigns such as signature, facebook, twitter, YouTube, telegram etc with certain percentage of the whole bounty pool respectively and you just have to concentrate on the one you participate in, know the percentage out of the whole bounty pool, calculate it and that's going to be shared by the 500 that participated accordingly to the stakes earned doing your task