Edit: Before you say nobody uses Yahoo mail, it's probably the 2nd most used after gmail at my school, afaik, I haven't met another person using protonmail.
I have Yahoo mail. And it's just occasionally 1 ad email that's clearly labeled ad, not greyed out, and maybe a banner. I've had nothing too intrusive once it switched. But it gave me a monthly option. Idk, as much as I hate ads, it's not that bad.
I’ve seen way too many Yahoo and Hotmail emails this year. I’ll send someone a message asking for their email (for business) and they come back with either of those two…
What are you talking about? ProtonMail is still a regular fully functional email provider. Nobody else has to use ProtonMail for you to receive the same emails you would on gmail.