camwhore.
I had to lol at this one, since I think I know what it means (there's more than one possible meaning, tho) but didn't realize one could earn crypto from it. These days there are too many people spending too much time in front of video cameras, trying to get attention and internet fame. That's why I stopped watching so many youtube vids.
But Op, you nailed every legit way to earn crypto pretty much and, I would point out, this topic is a horse that's been beaten way past the point of death. I wish there were stats on how much bitcoin is earned by which methods, but I'd bet that bounties and sig campaigns would be high up on the list. There's a lot of money that gets distributed by that kind of work, and I don't see people doing a lot of other jobs that pay in any kind of cryptocurrency.
The easiest way to earn in my opinion is by staking pos coins. That's as close to a source of passive income as you could get. You just own some coins, leave the wallet open and let the earnings come to you. You don't have to do much of anything, and it's even less work than mining.