I think the favorite mount and minion questions is a way to see what in game or out of game things you like. As someone's favorite could be one that is Mogstation only or from an art book purchase or as I said from an activity from within the game only. I haven't done the survey yet so I don't know any of the other questions besides those two and the final question. Yet if those two are anything to go by then I'm guessing they're trying to judge what activities in game do we do along with should they continue with releasing things tied to other purchases or directly to the Mogstation.