Apple has a point about accessories from third-party developers. The company does not welcome the enthusiasm of the "nouneis", granting the license only to the elected.
What is known
Now Apple has allowed "supporters" to create for the benefit of the company. Manufacturers of controllers, batteries, microphones and other peripherals can use USB-C, while maintaining Apple's approval. At least, this applies to laptops.
iPhone stands by
The company's generosity ended on their main product - the iPhone. Apple banned the use of Lightning adapters on USB-C for synchronization or charging of the smartphone. It is noteworthy that the fast charging on the iPhone X and 8 works only with Lightning on USB-C, which Apple sells for $ 25 or $ 35. At the same time, the company allowed "supporters" to create their own adapters 3.5 mm for Lightning for the iPhone.