There is no re-verification. Although I would appreciate the task of tracking every verified user since they last verified and making a cool formula-driven spreadsheet to do it, it would be very time consuming and I would have to revise and re-upload the CSS file constantly to kick people who have failed to re-verify. I would spend hours and hours in PM sending messages, mostly in futility, to users who have simply left or aren't regularly active. We have thousands of verified usernames, you know? Broadly speaking, we trust that the people who verify are the type who know damn well they aren't getting fat. I think there was one or maybe two exceptions. The time penalty doesn't justify any supposed benefit, though I agree that it's a nice concept in theory.  There were thoughts of adding tiers. People who choose to re-verify might get a different coloured flair or a different generic flair, for example. That idea doesn't blow me away, but the thought is out there if someone wants to suggest a way to add some spice without it becoming a cringe gimmick.