Bounty hunting is still fair, they just requires more energy unlike in the past where you can rely on few projects you promote, to get something good out of bounties today you have to do a lot of work and join many bounties
Increasing the quantity of the bounty campaigns will lead to the same result as we stuck in this process. The current bear market is the first cause of the low demand by the crypto investors and people transfer their crypto earnings to the traditional markets. Bounties will stay at the poorest dip until the market recovery.
The market value could go lower if more new bounty project will come out and there is no reason to create a project that has no purpose but to take down the value of BTC and obviously ETH since all of new projects are using he smart contracts which is already a lot of them in crypto world.
Thosr project before are just created last yesr of 2018 and 2019 should create more campaigns that couls give them benefits and also a way to promote the coin/token they have and attract more investor which is really they need to increase the market cap.
I don't it will happen but for me making more project will help to promote crypto the only bad side is there are more fake and scam project created day by day. Which will also prevent people to invest in crypto and afraid to be scam in Bitcoin.
Campaign is just a tool to promote a project to raise funds but most of the campaign right now are fake and not paying or if you get the reward you can't sell them because they don't have a value.