I am totally for this! I always tell everyone how relieved I was to find an RL/SS fic posted online--I was fretting that I thought I was alone in the world in this pairing! And now, 10 years later, I'm still celebrating it.
Some of my favorite writers never did move to the Snupin LJ or IJ, probably because they were still posting in their own private servers. But over the years, I've seen how writers and artists grow--and being a part of that makes me proud, even though I'm more of a spectator in this pair.
I'm going to pledge as well! One art per month, except I'm going to replicate some old art I did way back in 2000 in an attempt to study how my view of Snape and Lupin have changed for me, art-wise. :D I hope I can do this!