[Animats]

Not unexpected.

- Google cutting off using search from other than their home page code. (At one time there was an official SOAP API for Google Search.)

- Apple cutting off non-Apple hardware in the Power PC era. ("We lost our license for speeding", from a third party seller of faster hardware.)

- Twitter cutting off external clients. (The end of TweetDeck.)

[mfkp]

- Reddit cutting off API access for third party clients

[theshrike79]

They didn't "cut off", they just set completely bonkers prices for API use making it effectively unaffordable.