At the peak of the bounty/ICO hype, I've seen claims of users earning $2000 per month from basically spamming social media for bounties. That's significant in any country, and enough to make a very good living in most countries. It didn't last long for them, it must have lead to more competition, bounty spammers using more alt accounts, and the rest is history.
My signature pays a decent amount of money, but I don't need it. It's small compared to my cost of living. If I divide my "Total time logged in" by what I earned from this forum, it's not worth my time at all
![Tongue](https://bitcointalk.org/Smileys/default/tongue.gif)
But money isn't the main reason for posting here. I'm not selling nor buying Bitcoin, I'm just in for the ride. I've said before that I like the ride up more, after which someone (probably in the WO-thread so there's no way to find back a quote) responded that the ride down is more thrilling.
I wouldn't mind making a living off the forum though, but so far I've only been able to hook temporary signature campaigns to manage (and they didn't pay that much).
I like to think of it from a different perspective too: the fact that this forum offers many opportunities to earn Bitcoin, and many people actually want it, is great for adoption.