Amazon got a special deal.
https://www.bloomberg.com/news/articles/2020-07-29/apple-con...
https://www.bloomberg.com/news/articles/2020-07-29/apple-con...
Depending on the product, you could be losing a significant portion of your customer base before then. For example Netflix, known for insanely good retention, loses nearly 40% of customers by month 12. [1]
[1] https://secondmeasure.com/datapoints/netflix-disney-plus-app...
"The agreement with Amazon is similar to a program Apple announced earlier this year letting select developers avoid the 30% fee in exchange for integrating with certain features. Amazon is part of that program."
Clearly for amazon, but not the same as any hypothetical negotiated private side deal with facebook.