I remember a POS coin that was paying a decent amount as well, and it was tradable but I can't remember the name anymore... any idea?
https://bitcointalksearch.org/topic/safe-campaigns-in-the-altcoin-section-to-join-dont-waste-your-time-with-others-5228629
The op of that thread suggested few campaigns with his own reasonings on why it seems legit. Still conduct a research to make sure its worth your time.
Yeah the thread that you share is very suitable to join the bounty campaign. There are separate reasons to join in and the most important thing is to do your best research and don't rely on others it is not good in my opinion.
There is still a good bounty of signatures in altcoin, try to search carefully.