https://arstechnica.com/gadgets/2022/03/google-pilots-alternative-play-store-billing-options-but-only-for-spotify/

Google is once again not putting its foot down on big developers who refuse to use its in-app billing system. The Play Store always required developers to use Google Play's in-app billing system, but many big developers like Netflix and Spotify simply ignored the rule and did their own billing anyway. Google never punished these companies, but it did announce a deadline to switch to Google Play billing by September 2021—and then allowed extensions to March 31, 2022. This is the second time the deadline has gotten close to arriving, and we're again seeing cracks in Google's attempts to enforce its rules. The latest news is that Google is expanding third-party billing in the Play Store, at least for one huge streaming company.

Google's latest blog post said the company is now launching a "pilot" program called "user choice billing." Google said the program will "allow a small number of participating developers to offer an additional billing option next to Google Play’s billing system." The only announced participating developer is Spotify, one of the two highest-profile companies to continuously ignore Google's rules. Google said, "This pilot will help us to increase our understanding of whether and how user choice billing works for users in different countries and for developers of different sizes and categories."