I don't think bounty hunters are used as bait by campaign owners. It all depends on market conditions. in 2019 indeed almost all bounties are worthless. The project team did not dare to register their tokens in exchange. but for this year, many projects have dared to enter the market because the market conditions are very good. So the bounties tokens will also have a good price or in accordance with the price of the token sale period.
Not only the market condition, if the team lacks a lot the project will easily fail, there are few bounty projects that became successful in 2018- 2019 and at that time the bear market was very powerful, its all down to how professional the team are.