There is I think bunch of people make a living just by doing bounties and airdrop me for example hahaha.
Although the monthly earn is unstable sometimes you made a decent money sometimes don't because you know airdrop and bounties is seasonality program.
I know a person that made more than 300K recently from ARBitrum Airdrop can you imagine that and if you live in country like Indonesia or Turkey or maybe other southeast Asia with 500-1000$ can do living with good meal and good living
also there is dedicated thread that discussed about Is there a place in the world you could live like a king via sig campaigns? by The Sceptical Chymist you click here -
https://bitcointalk.org/index.php?topic=5390048.0