The best time to promote bounties are on altcoins season ,if you are tired of one delay after the other just quit till altcoins season returns ,this is the reason why 2017 was the best year for bounty hunters
Or you can keep promoting alts till when the seasons returns, this way you would have accumulate a good number of different alts, possibly some out of it will yield something good, honestly, the market situation is making it very discouraging to support any alts bounty at this time, it is all about having faith in the market and the project you support.
Indeed, it is just a matter of luck I guess, it is better to work to accumulate variously alts and hold until it goes back again rather than doing nothing, I know that some of them will not fruit a good cause but still, this will be profitable in some other ways. Besides, as the bull market comes I believe that altcoins will also bloom probably not in the form ICOs just like the year 2017 but much better. And if the market goes back again this will capture more investors that will revive the seasons for alts.