Yeah, they scale up the amount you would receive in terms of $ worth, no fixed amount of token/coin so the paying is kinda low with only a couple bucks per week. All the good-paying bounties and airdrops are full or limited. Thought I think bounties and airdrops are still worth as long you can join in the good-paying or cherry pick a really promising one to join in.
Yes, it's obvious because every good choice will always pay very well for the duration of time we give and the payout will also be adjusted, so there's nothing wrong with bounties and Airdrops so far, because good proof of payments is still in some projects.
There are still some good projects which bounty hunters could really snip on but chances or odds on hitting the right spot is something that not everybody would able to experience on.
Worth for those people who do have some full time on dealing with bounty works and its also it isnt bad to make it as a side work for you to assumpt that it turns out to be a good one.
Depending into your own preference and time and if you do see that it isnt really affecting much of your time and those doesnt really eat too much work
then i might still considering it.