Keep in mind that shrinking is a niche thing, even more so than giantess. As has been said time has taken it's toll. People end up moving on with life.
I know that the minimizer has a DeviantArt page.
https://www.deviantart.com/the-minimizer
I have also become less active. Mostly because I have been working full time now. So the free time I have I tend to spend it on gaming. As I have been a gamer long before my interest in size changing fiction.
But I have been working on some more fan submissions for Shrink Fan Comics. Yes I'm TieAvenger. The next being the last of the Final Fantasy trilogy I planned, with Lulu shrinking. Though I understand that the last one did not go over well with some, as it was a shrinking/shrunken man story.
I am working on another short shrinking woman story. However, I find it difficult to write. Need a better way of describing clothes people are wearing.