Airdrops and bounties are passive these days.
I do agree that it's an example and it would be good if you'll also look for other opportunities. There are many ways that you can earn but don't say it's nothing.
Your skill/s are worth being valued and get paid so that's why you must value it and use it to offer and make money out of it. That's another way, look for online jobs that suit your skills.
I agree! Simply put, it's basically cause and effect.
Because if you say that you've earned money out of nothing, then by doing nothing... nothing means that you didn't do anything at all to possibly make it happen.
But if you've done something at least, a task, job, or even a trade-off of your time or effort, that's something at least that you've done in order to be able to get something out of it later.