Try it: the bar at the top of this page counts down 24 hours for each visitor. After 6 seconds, a small question asks if you want the offer; answer Yes to see the sign-up form.
The bar is part of the page, so it pushes the content down instead of covering it, and the page does not jump while it loads.
One question first
A Yes / No first step asks for a small click before showing the form. Visitors who say no close the popup at once, and those who say yes are already halfway there.
Northfield Cycles is a fictional workshop for this demo. The offers on this page do not exist.