Personally when it comes to choose on what bounty would I'll be joining is I choose the most reliable campaign manager. For me it depends on who is the campaign manager who will manage the bounty. Sometimes I also see that it is worth to join in a campaign, I will see the pay rate after the campaign.
Indeed a manager is very influential in considering the bounty program that we will follow. Experienced managers will undertake some serious expeditions related to vision and mission, team, and so on for new projects before launch.