There's an artist whose work used to be on this site until they made a takedown request. Since then they've been on the Avoid Posting list.
At some point since then, they've added a note to some (but not all) of their social media accounts, stating that their art is CC-BY-NC-ND: freely redistributable, as long as it's credited and not altered.
So, in this situation, which of these takes priority: the fact they've released their art under a Creative Commons license that says it can be shared anywhere, or their earlier request that they don't want it posted on this site?
I see two different ways this could be handled:
A) "If they've released their art under a CC license, that takes priority over any other wishes they've expressed about places where it can or cannot be posted. So this artist should be removed from the e621 DNP list, and their art can be freely posted here by anyone. (But only images that are sourced from the accounts that display the CC license notice.)"
B) "They may have released their art under a CC license, but this site can still make its own more restrictive rules about whether their work can be posted here, and those rules take priority. Since their last direct request to e621 was that they didn't want their art here, we're going to respect their wishes and keep them on the DNP list."
Personally, I think that (B) is probably the best thing to do: following their last direct request to us is the more cautious and respectful thing to do.
But maybe this situation is something that should be explicitly clarified in a rule somewhere, in the unlikely event that this conflict becomes an issue in future?