Mutt
I think you will find that in most industries. The producers are at the bottom of the pile. But if you do it a little better, it helps.
The big difference between this industry and the mags is magazine editors look at as much work as possible. They're always interested in seeing a new photographer, new girl, new style. Frightened of missing something. They know the right girl on a cover can put up sales 10% and the wrong one can lower sales 20%.
How many times have I heard the "I buy from XX number of suppliers and that is fine for me. It alows me more time to do more important things" Usually drive traffic.
They don't realise there are a more "Tawnee Stones" out there, better photographers and better work. That covert the same amount of traffic an extra 10% and retain it longer.
I suppose if you come from a computer background you tend to view it from that prospective, if you come from a "Jerk off" background you look at it different.
As for mark up on a days custom work, it's simple. I take the models money. Add the money I want for the day and then consider what it would be worth if I put it up on our site.
So really worked it out as follows. Regular clients get something off these prices. Video adds 50%
Solo girl
Whole day shoot = 5 sets $1500
Each set $300
Single set $450
Two girls
Whole day shoot = 3 sets $1800
Each set $600
Single set $900
Boy & Girl
Whole day shoot = 3 sets $3000
Each set $1000
Single set $1,200
With boy-girl there are very few who can shoot it like we do and it sells a bomb. So we reckon as it takes a week off my life to shoot a day of it, I want paying for it.