I’m pretty sure they’re just going after advertising on the front and data sales/AI on the back end. It’s inherently difficult to monetize an old-school internet forum, especially one like Reddit where the incumbent user base is vehemently opposed to adverts and in strong favor of privacy. I don’t think they’re too big to fail (cough Digg), they’re just popular and people dislike change. But I do think they’re barking up the wrong tree with their userbase.

The current account I have dates to 2015 before they required email, and they’ll get a throwaway before I give them one of my real ones. But even then, whatever, I’ve really only gone back there maybe once a week for the past few years.

You’d likely get scooped up for reeducation within 12 hours of posting it.

I have a custom domain set up on proton for my business, and I haven’t had issues either. My personal @protonmail.con address hasn’t had problems. I think this is typically an issue when setting up a local mail server, and gas something to do with security certs.