"Ehhhhhh..." Pinkie wobbles her hand in an uncertain gesture. "I don't really know. They're just weird about that kinda thing. Maybe because...it's weird publicity?"

She doesn't sound very certain. It's not a good excuse at all - why would their fans care if they believed in ghosts or something? But management has to have some reason. They just maybe don't need to know everything! "You can totally talk to us about anything, though! We've got your back!"