ActingDad, NYU is consistently at or near the top in the application numbers game every year, both generally, and for Tisch. The school doesn't need famous students to attract high numbers of applicants. The tuition is already among the highest in the country. Alumni donations to Tisch, by famous alumni or not so famous, are notoriously low. If by ticket sales, you're talking about tickets for productions, they're always sold out anyway and James Franco being in the Graduate Film Dept. would have no effect on Drama productions.
I'm not saying that these issues may be factors at some other colleges, but at NYU? Doubtful.