I think as far as cross over gals Jenna did best by getting Bella.Thats the closest I've ever come to buying a vivid movie, and when i found out Harry was in it I put it on my to rent list.
Belladonna prolly has the biggest raincoat following.
I don't think it would work as a regular staple of the Jenna Loves series cause the hardcore fans aren't buying g/g movies anyway so that leaves the sales to the vivid fans who would much rather see jesse jane or the like.

I think Jamie hit it all on the head though.