Your service has been great over the years. I sign in daily to check stats and prep upcoming emails. As someone who signs in daily, it gets tiresome to have the popups show up every day as though I've never seen them before. Maybe if (in your programmer's "copious" free time) you could program something that recognizes how often a user has clicked off of something or closed a box so the system knows to stop making it pop up.
It's a little thing, but sometimes the little things make a difference in a user's experience. You've made a lot of other "little" changes over the last year or so that have greatly improved the experience.