I think it is the general attractiveness of para social relationships (https://en.m.wikipedia.org/wiki/Parasocial_interaction https://en.m.wikipedia.org/wiki/Pa

I think it is the general attractiveness of para social relationships (https://en.m.wikipedia.org/wiki/Parasocial_interaction https://en.m.wikipedia.org/wiki/Parasocial_interaction). People look for personal, intimate interactions. OF creates (the illusion of) such relationships.