Many people fail to appreciate the full extent of the defamation campaign that was waged against ProtonVPN by PIA and others. This was not the case of a couple fake accounts that could be handled with manual moderation. We're talking literally hundreds of accounts trying to spread false information, to the point where it became a case study on fake news: https://twitter.com/conspirator0/status/1036353291662360577
The fact remains that to this day, ProtonVPN remains the only VPN service that has been thoroughly and continuously vetted by an independent third party, Mozilla no less: https://protonvpn.com/blog/mozilla-partnership/