Simple Simon says;

1. porn is; solo wanking, jacking off, pulling your pud, spanking the monkey ...
   
2. social interaction is; doing the above with an "internet friend (not all by yourself)".

Static porn is something you beat your meat to alone. Cams and Dating you beat your meat with another person.

So, the personality factors are much more complex. (Especially for the long term customer.)

For a cam girl (model) to succeed the person you refer needs to like the model as a person not just as a moving image with big tits or a dominatrix plugging guys asses with a strap on.

As example: They might like to meet a dominatrix that will order them to plug their own ass on cam while the dominatrix watches -- this game is about people and satisfying their desires live. Really, whatever rocks their boat within legal limits.

Cams and Dating is about real life people and their relationships to one another.

You have to sell the dream -- to meet someone online to have sex with -- interactive (not alone)

Like a synergy
"2. An effect of the interaction of the actions of two agents
such that the result of the combined action is greater
than expected as a simple additive combination of the two
agents acting separately;"