The original portion of the thread was not oriented around Bandcamp, but that is where the most free music can be found. When other sites come up with free offers, such as Archive.org or Music Direct, someone will usually post a link. Of course, Linn Records has their "12 Days of Linn" or some such, with a free track every day before Christmas. What molecule stated is true; after a while some of the links are associated with a fee. That is the beauty of NYP: a certain band is trying to get their music and name out there and, in essence, say, "Here is what we are all about - check it out on us (of course donations are appreciated)." Sometimes a known band will offer their music for free, like when Gorillaz had their complete discography back in '14.
And no, this thread is not clickbait, I have discovered, thanks to members like molecule, TJ Elite and many others (I do not mean to leave you out if not mentioned - thank you for your contribution!) a lot of diverse and really cool acts. Most of the time, I pay a donation and, if I like the band, find other musical offerings and pay whatever they are asking!