Welp I guess this is the perfect example of companies not deleting your credentials and account info when asking for it... I deleted my Notion account several years ago. And completely randomly today got an email from them about data retention, assuming this is one of those "important" emails they have to send out. Sadly, years ago I wasnt using email-aliases like I am today, so still stuck with them having my email. Fuck I hate this so much. Thought I'd just share this lesson, use alises my friends!
This is what I use today. However spammers can easily remove the plus address to send email normally so isn't quite so effective.
What frustrates me is so many websites strip the '+' from the address, either as inline JavaScript or even worse, after submission.