yea, preserving deviantart is not a focus like anywhere as far as I know, and hopefully the artist themselves do, but it’s vague. It does match with how historically art has usually been a big job to try and preserve once the artist is dead.
For preserving music (since you mention bandcamp) I recommend supporting your local library; an here’s a list of some US music libraries. https://www.american-music.org/page/Libraries
Most nations do have some type of music archive as well, and it’s not like software which faces legal issues for historical preservation.
Spesifically it seems like a lot of spam/porn users have floodded the comment section with porn. I only got one from my instance; but blocked and reported it 🤷