So, if a free-to-use app suddenly becomes pay-to-use and all users lose their access to their data unless they pay (similar to an app getting malware but in a l

So, if a free-to-use app suddenly becomes pay-to-use and all users lose their access to their data unless they pay (similar to an app getting malware but in a legal way), and then those users review with 1 stars...Google will remove those reviews? This is dangerous. I remember some cases where an app suddenly changes owner and adds ads and other unwanted features. What happened in those other cases?