ProtonVPN and Mullvad are both blatant honeypots, they don't even have port forwarding
Discussion
I fear Proton AG is new new Crypto AG, yes. There were rumors that at least one of the alternative mail hosters is a honeypot and in 2023 it was alleged to be Tuta (when they were named Tutanota).
Sus how they rebranded shortly after: https://news.itsfoss.com/tutanota-rebranding/
I guess we'll know in maybe 10+ years. My current threat model aligns with using Proton.