Bounty program can be categorized into 3 kinds. First, there is a program that rewards people who provide ICO review, information, etc. through social media, forum, etc. during ICO period.
What else?
Second, it is a translation bounty program that runs a reward program for the translation of white paper, website, and so on. Third, it is a bug reporting bounty which is a program that rewards a participant who finds a problem in publicized software and platform.