Well, no. Disney does not pay Hasbro or Mattel to use their characters. It does not pay clothing producers. So no, you dont have to pay people to use your IP because it's just advertising. Disney's IP is their core product.
You can make the argument they should let Sora use it to advertise. But that's not necessarily how it works. And for good reason - fan content doesnt necessarily benefit Disney in a measurable, controlled way. Furthermore, the IP is the thing they themselves are trying to sell you.
Well, no. Disney does not pay Hasbro or Mattel to use their characters. It does not pay clothing producers. So no, you dont have to pay people to use your IP because it's just advertising. Disney's IP is their core product.
You can make the argument they should let Sora use it to advertise. But that's not necessarily how it works. And for good reason - fan content doesnt necessarily benefit Disney in a measurable, controlled way. Furthermore, the IP is the thing they themselves are trying to sell you.