Hi, just thought I should share this: https://vpnpro.com/blog/how-to-manipulate-google-play-rankings-and-get-280-million-installs/
Apparently, a lot of free VPNs that are out there either collect data for the Chinese government, or do not feel obliged to keep it safe at all, so they can sell it/ use it for other purposes. I've never used free vpns, but if you do, I suggest doing some digging, because you might be exposed to some real risks, especially if you live in less free countries.