Basically what they are, is a place for Doll Owners, admirers, Love Doll Vendors, Doll Makers, etc.... to get together and socialize. The owners bring their dolls and or photos of their dolls. The Vendors and Makers bring their newest models and the favorites so that they can show off their wares and take orders. The Admirers sometimes become owners. Plus, it gives like minded individuals a place to hang out.
Speaking as a biological woman who collects dolls and has a doll for companion purposes, I love mine. She's only 16 inches tall and a great shoulder to cry on. I'm agoraphobic and it's really hard for me to make friends in the outside world. So online communities are my best bet. Also, having dolls around gives me some semblance of a friendship. Is it a little strange side? Some might say yes. But I prefer to say different than average.