Stop attaching links to protonmail.com inside each email
Whenever we send an email protonmail always attaches protonmail.com as a comment to the signing as well as the gpg key. I feel this is forceful advertising by protonmail. As of now there is no method to remove the same.
Learn how to read:
A paid plan is required to turn off the ProtonMail signature. Paid plan revenue allows us to continue supporting free accounts.
Yes, I leave it on also. In fact, I only know about Protonmail because someone had it in her signature when she emailed me. I, too, want to help advertise it!
I like this feature. I had to explicitly enable it.
You can disable it under settings > account > Protonmail Signature.
I leave it on, though.