Depends. Imagine you're an Apple supplier. You're making money hand over fist, but to become a supplier to Apple you had to retool your entire factory floor, retrain a bunch of employees and basically sink a lot of capital into meeting the strict requirements. So you don't want to lose that contract. And you've probably had to sign some sort of exclusivity agreement for the privilege. I seem to recall that's not uncommon. So Apple's permission to manufacture other stuff is pretty helpful.