Is there an actual post about 3DR going to SubscribeStar? I asked previously if there were any updates to their status on their Patreon. a quick search on Sub-Star and shows nothing for 3DRComics.
With the number of developers moving to SubscribeStar over the issues with itch, and other sites, choices to not support certain fetish subjects I was not surprised to find 3DRComics having the same issues. I forgot which site I found mention of considerations of 3DR moving to SS but it was there. I am surprised that you did not find them. I had not been there as I do not have an account/login there yet. Have not really had free time, or need, to go there and open an account so I can login there but it most likely will happen soon with the number of developers I do follow who have posted they have moved there. Mabye 3DR is actually taking a break right now. Who knows. Fingers crossed they are in good shape somewhere.