I wouldn't say "dated", but I used to know a couple women online from the community who were into big guys
Honestly, it was pretty gratifying. I've never had anyone be so attracted to my size or even the little things like how my old chair would creak as I moved around during VC. She was a gainer herself and would often encourage me to try it, which I eventually did and kept up with for a while after falling out of contact with her
I still think about her from time to time, even if I haven't kept up with the gaining myself lately