I agree with everybody.
People watch and attend more to see cup drivers. If the Busch drivers are supposed to be getting experience for racing cup, then better to have some cup drivers there too. On the other hand, it stinks that no full time Busch drivers have even won a race.
I think there needs to be a balance. As others have said, let the cup guys in for all the reasons stated, but limit it and give the Busch guys some space.
Also, no points or money for anyone who isn't running Busch full time.
Also, I think it's ok for guys to run both series full time if they can pull it off. Kind of like the "Iron Men" of Nascar. I like it.