As a bounty hunter always expect failures sometimes
1. Just because a golden year occurred in the past doesn't mean we will witness such again, yes it's possible but better adapt to present condition.
2. Promoting two to three projects and waiting for your payment doesn't make sense, as a bounty Hunter the sky should be your limit, since we can't tell which project will pay or not I suggest continues hunting.
3. Listed bounties may not pay, it's still same risks as bounty projects that aren't listed on exchange yet, rewards may vary but who am I to tell? I'm not a great seer am I?
4. Scammers takes advantage of Cov-19 alot and many still fall victim upon all the warnings, now we only have few days left till next Bitcoin halving, few new scam projects will surface, keep your eyes sharply opened
I go more to point 2. A good project generally has its own differences in terms of the number of participants or the duration of the campaign, this is where the motivation that every baunthy hunter must have in choosing. It is deemed necessary to minimize failures and unreasonable payments after promoting one or more of the projects we have participated in.