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
I think quality over quantity is the best method rather than joining a lots of entries just to earn. I know this cause before I participate on lots of campaign with social and few of them give me income. So before you promote, make sure to research about them so your effort and time wouldn't be wasted. Just my 2cents, be thorough its okay to take time on reviewing its not all about money but time management.