TECH CRUNCH - Google is expanding its user choice billing pilot, which allows Android app developers to use other payment systems besides Google's own. The program will now become available to new markets, including the U.S., Brazil and South Africa, and Bumble will now join Spotify as one of the pilot testers. Google additionally announced Spotify will now begin rolling out its implementation of the program starting this week. Developers interested in adopting user choice billing have to follow certain UX guidelines set by Google that detail how to implement the feature in their apps. While the general terms offer a 4% reduction in commissions paid to Google when user choice billing is used, Spotify wouldn't comment on its confidential deal with Google, but notes it meets the company's standards of fairness. It's unclear if the streamer has been offered more favorable terms as an early adopter.