I think those Mistresses make pretty good points.

Something I've noticed about online vs RT play is that us RT players do have to acknowledge the line between fantasy and reality in the way an online or phone domme does not. With phone play you don't schedule an appointment or deal with providing references/deposits, most clients don't ever really talk to the domme "out of character" the way you might chit chat with a pro-domme after a session, and the fantasies you act out are not limited by practicality. You can call a Mistress about a scenario in which -- for example -- she makes you suck a dozen dicks without ever thinking about how difficult it would be to get twelve guys and your Mistress to line up their schedules, the possibility that some might have trouble getting hard or ejaculating or how much it would cost to make that happen.

I think that freedom to fantasize can be very seductive for a certain type of sub.