I'm not a bounty hunter, so following bounties on forums just adds to my crypto knowledge, so when there is a bounty payment paid in BTC I think this is very valuable, because it is paid weekly. And I also observed on this forum and the one next door, bounties have started to decrease in the last few years. I prefer to be a trader, because even though I don't get much results because my capital is small, my opinion is clearer, because many bounties are worthless and don't pay out.
You join signature campaign, it is non sense if you think you aren't a bounty hunter. We're the same, we're bounty hunters. 
Even if you focus on trading now, you did bounties in the past, too. For me, you are still a bounty hunter, it is not so different with me.
Yes, the bounty is no longer to pay us with proper amount of money. It is one of the reasons that many forum members have stopped their activities in some crypto forums. It is our choice to stay active or not in the forum.
Actually, bounty hunters are very good to do, especially with BTC payments, which are very good compared to new project bounties which, of course, are very unpredictable for payment.
So I think many are still doing bounties, especially signature bounties, which are very good for payment and are not too difficult to do compare to doing it through social media.
But it is true that if you want to participate, you must join a forum that has indeed provided the bounty, because without a forum you may not be able to participate.