Yeah, Proton is shady enough as it is. We don’t tust them very much.
Discussion
I disagree. It depends on one's threat model. They are awesome at what they do—not everyone is Snowden, on the lam with government secrets. They provide an important alternative to Google for most people.
Tutanota is way better, and more trustworthy. Proton is avery shady company, with dirty marketing tricks.