These restrictions are pretty much nonexistent now if it wasn't obvious from my most recent posts. (and upcoming collabs)
Collabs are still mutuals only, no plans to change that.
do you do collabs nsfw? — Yes BUT mutuals only I think, I'm very protective of Kira and who she interacts with. I have a restrictions in place for collabs that depend on who, what, and which version of Kira is involved.