NG is a stable community overall. Not as volatile as X. Facebook, DeviantArt and Tumblr. There money making aspect is based on you rather than on the site. So that is why alot of newcomers gets discouraged of that DIY mentality. But I understand your view on the fact some artists stop coming back after one or two post. Its a slow burn compared to the rest of the sites out there.
HerrGammelig
I think this site in particular has the best community for anything and everything. I can't think of a reason why more artists don't use Newgrounds other than the relatively limited ability for beginners to take off in popularity. I still think it's far better than twitter/bluesky even taking that into account.