As long as new projects and coins enter the cryptocurrency world, as well as this forum exists, Bounty programs will run. These new projects and old projects which wish to refine their strategies need the help of bounty hunters to spread the awareness across all over the globe.
I have always say this, the end of ICOs will likely be the end of bounty programs. The reason why we have the bounty campaigns today is because the ICOs are looking for people to help them advertise their projects. Without the need for adverts, then there will be no bounties.