I used to be of the opinion that Skype shows were overpriced and that they should cost the paying customer less than a private show on MFC. But then, things were pointed out to me that I'd overlooked and then I gave it more than a few second's thought and now I've changed my mind completely.
Like Just Me pointed out, most Skype shows are gonna be paid for through MFC anyway (safer than PayPal, yeah?) so there's no saving to be passed on to the customer to begin with.
But assuming the model does accept PayPal, or gift cards, or money transfers, or cheque, or postal order (are they still a thing?); while the model no longer has to give up 50% of the money she makes for the Skype show to MFC, that money no longer goes towards her camscore, which could negatively affect her down the line. The extra money she makes on the Skype show at least compensates for that though.
The other thing to take into account is that things cost what they cost. If a model believes that 30 minutes of private time with her on Skype is worth 2000 tokens, then that's what it costs. You can't expect somebody to lower their prices because they don't fall in line with your expectations.
I went shopping for some new trainers ('sneakers' to you American folk, I believe) the other day and there were a few pairs that I really liked, and would really like to own, but they cost too much for me to justify buying. That doesn't mean they should cost any less though. The fact that I can't afford them isn't Adidas' problem. It's mine.
If something truly costs too much, then nobody will pay for it and it will never be sold. So long as people are taking a model up on their Skype shows, they're not charging "too much".
People seem to forget that private shows and Skype shows and custom videos and pic sets and panties and jet packs and caviar and Adidas trainers are luxuries. They let their sense of entitlement get the better of them and convince themselves that these things should always be within their price range, because they want these things and why can't they have them, dammit!! The world doesn't work that way sadly.