Google is required to change its Play Store policies in the U.S. due to a court ruling, allowing developers to use alternative billing systems starting October 29. Developers can now inform users about alternative pricing and availability options outside the Play Store and implement their own payment systems for in-app transactions. They may also continue using Google Play Billing and offer lower prices for alternative payment methods. This ruling is a result of a legal dispute with Epic Games and restricts Google from certain exclusivity agreements with OEMs and app developers.