The same thing happened to me a few weeks back when I got an email about my “twitter birthday” and how I should post something.
I just deleted my account instead.
I had the same thing happen with Facebook texting me to post after I turned all notifications off in settings, which was the final straw that got me to delete my FB account too.
Now it’s a pattern I repeat everywhere: if your site emails me, I always will click unsubscribe, and go through every possible setting you have to stop you. If you email me again, I delete my account.
After 5 days of that I finally bothered to look. The notifications were about someone mentioning me in December.
https://i.imgur.com/MaH7EcW.png
How about not doing that?