I mean about adult membership paysites. I not think that sharing access with other paysites is good idea. I think about banner exchange between 2 separate membership sites, in short- between separate adult affiliate programs.
For sample:
I have aff. program with sites A, B
You also have aff. program with site C and D
We make banner exchange with our sites with relevant niches:
Site A changed banners with site C and site B with site D
All these banner will be placed in to membership area.
It will be work?
It give you and me a new membership. No?