I can't seem to upgrade the Promotion action past level 6 because of the fame point requirement for variety shows.
To reach level 7 promotion, you have to accept a variety show that gives you over 3000 fame points and a drama role that gives you 5000 fame points a week. The drama role requirement registers fine, but the variety show requirement never seems to work. I've even maxed out my variety contacts at level 10 and accept a ton of big variety show deals now that more than exceed the 3000 fame point requirement, but the requirement never moves up from zero.