https://arstechnica.com/gaming/2018/08/apple-shuts-app-store-affiliate-program-imperiling-recommendation-sites/

Apple is shutting down an App Store affiliate program that shared a small percentage of revenue generated by third-party links to purchase apps or in-app content. The move will likely have an outsized impact on sites that provide editorial reviews and recommendations of mobile games and other apps, which rely on that affiliate revenue for much of their budget.

The announcement, which will become effective October 1, comes just over a year after Apple cut the program's revenue sharing rates for mobile apps from 7 percent to 2.5 percent. Affiliates will still continue to earn a commission on linked sales for iTunes movies, TV shows, music, and books, as well as subscriptions to Apple Music.