Aside from Tapas the only social media I'm currently active on is Twitter, Instagram and Ko-fi. I've made a DeviantArt but I haven't put the page to use just yet and I'm looking to give Medibang's ArtStreet a try.
So far I've done the best on Twitter but I figured it's cause it's where I'm most active either posting or interacting with other peoples content (likes, comments, rts, art shares or art challenges). The amount of likes/rts i get depends on what i'm posting though so sometimes fanart does better and other times original content does more numbers.
Instagram was okay but once I was posting less it did the inevitable with dying down. Fanart definitely seemed to do better but there were a few original characters from my webcomics who managed to do numbers every now and again. Algorithm changes also made things weird so it's been tough trying to get back in without knowing what's most effective (tips now seem to suggest a balance of consistent but not daily posting, liking and commenting on others posts, sharing to stories and reacting to/posting stories of your own and others)
My Ko-fi's main purpose is as a tip jar and I've done okay sharing comics wips there exclusively as well as process gifs. Offering stuff in return like sketches or wallpapers has done okay and I've got a few consistent supporters
I'm still debating how I intend to use DeviantArt but using it as a place to toss sketches does seem like a fun idea. Meanwhile I wanna use ArtStreet for some of their illustration contests or more experimental stuff that differs from my "usual" content or style.
I've considered other places like tumblr but I think I'd get confused or lost too easily