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.
I like this feature. I had to explicitly enable it.
You can disable it under settings > account > Protonmail Signature.
I leave it on, though.