Bounty campaigns are not only for newbies but for all ranks in the forum. Even though you are a legendary member of the forum and you see any bounty project that interests you to promote and you think you will get a great reward at the end of your promotion, you are allowed to do so, and nobody in the forum will stop from doing so.

Just like you said, bounty campaigns are a waste of time and time-consuming, and you might end up not getting paid for promoting a bounty project for months. Even though you get paid, you might not get a good reward when the token is listed on a centralized exchange. If you must promote a bounty campaign, make sure the payment is in stablecoin and escrow so that you will be sure of getting a good reward at the end of your promotion.