Bullshit. It's intentional. If it were just a bug or a glitch, it would have been fixed long ago, since this thread was started over two years ago. The app on my phone sends me notifications on a regular basis, asking me to verify my email address. It doesn't make a bit of difference whether I acknowledge the notification within 10 seconds or if I wait until the next day. I still get another notification later on. I haven't kept track of whether they show up on the same day every month or not, but maybe I should.
My email hasn't changed since I signed up for Evernote years ago, and I've lost count of the number of times I've verified it just to make that notification go away, not to mention verifying it via email when I first signed up. If my email changes and I don't update it in the app, then it's my own stupid fault if I don't get important emails. Evernote just wants my email address kept current so they can send me ANNOYING emails whenever it suits them, and make sure that I actually receive them. Any employee who says otherwise is either intentionally lying to me, or they have been lied to by someone else in the organization, and so they are unknowingly lying to me. As someone else pointed out, no other app repeatedly asks me to verify my email. This behaviour is unique to Evernote.