Although, I can imagine that the bounty "business" was much more lucrative back then, which may be why they do it now with dozens of their alt accounts. The law of large numbers, I guess.
Yeah, that's it. Some of them probably remember the good old days and expect those days will return, you just have to stay patient and keep posting those social media links. If you live in a third-world country where an extra $10 a month makes a big difference to your economic status, you can understand why some people do it. Multiple accounts signed up in dozens of bounty campaigns. If 99% of them scam, there will always be that one that will pay those $5-10 and people are satisfied with it. Even if none of them pay, there is always next month and the one after that...