The part I don't understand is that you have one single production cost, but different pricing according to the rights they acquire?
Rights ? What rights? In the fashion/editorial jobs I see, it's a one off fee, no sliding scale. You, the photographer, surrender all the rights - more often than not. Budgets are slashed, where once exotic trips could be 1/2 weeks, now it's 3/4 days, Editors are responsible for the costs - not your well being. Within certain limits, photogs enjoy patronage and there's an understanding - up to a point. MF 'rental fees' , a euphemism more often than not, is away of getting to the bottom line while allowing the editor's to justify costs to 'those upstairs'.
Didn't ChrisBarrett post a rationale on LuLa as to why he now bases his fees on a one-off, all-in basis ?
No matter what we say, MF still seems 'de rigeur' in many productions. Don't think that will change, at least not until the Pirelli calendar gets produced with an iPhone!
I suspect cooter is referring more to advertising than fashion editorial.