I did some more creeping, but this is probably the end for me if he doesn't get back to my email. He was involved with real estate, but their realty webpage is offline and the last record in the Internet Archive is from 2018. That's the last time I heard from him as well. My original comment was incorrect -- that's the last time I interacted with his service.

I wonder if the whole thing was on auto-pilot until things eventually broke.