There are a lot of bounty projects out there on the bounties thread posted by different bounty managers and even though most of them are trying as much as possible not to post any scam project to tarnish their image, it is very advisable to do your own investigations on any project you decide to promote, research the project, the team, its board of advisors, how their support channels work and the investors or partnerships backing the project to determine its legitimacy because bounty managers do not determine the legitimacy of bounty projects.