Odd, I didn't even know Proton had an AI feature until I read this article. Didn't get an email or tooltip while using the app. Didn't previously explicitly opt-out either, and when I check my notification settings, Lumo product updates is set to disabled.
Maybe someone's feature gate isn't working as intended?
I did get the Github Copilot spam email today though.
Me neither, it's probably related to OP having a business subscription