you can ask about him on Collectibles. You will find someone who has information about him, and I hope he is in good health, as he was one of the active members.
As for the reason for the inactivity, it may be
Agreed, Theymos is not a regular user at all. I decided to just remove my entire list and get removed from this whole DT disaster moving forward. The never ending drama of this stuff has gotten old and just ignoring it all makes life easier.
it is better to let people live their lives.
it seems he is still in DT list but October 27, 2020 is the last time he was active.
It is not surprising that he is a DT. I have added a number of inactive people to my trust list because them feedback is worth reading and I think everyone does that.