I checked out the provided links. It is weird. Even if it were a wrong conclusion, it seems fishy.
- ProtonVPN UAB lists Tesonet's CEO as a director
- ProtonVPN UAB is operated from Tesonet HQ in Vilnius, Lithuania
- ProtonVPN UAB uses previous Tesonet's technical employees
- ProtonVPN uses IP address blocks that belong to Tesonet
- ProtonVPN mobile app is signed by Tesonet
It seems, that ProtonVPN is a free VPN service by a data mining company from Lithuania.
Proton has also been thoroughly audited/vetted by third parties, including Mozilla: https://blog.mozilla.org/futurereleases/2018/10/22/testing-n... and also the European Commission which partially funds Proton: https://protonmail.com/blog/eu-funding/
Any data mining claims are categorically false, and doing data mining would also subject us to fines of 20 million Euros as discussed here: https://protonvpn.com/blog/is-protonvpn-trustworthy/