The Landing Page Expiration feature is something special that we added. One of the biggest challenges for media buyers is having competitors copy your hard work. This feature was designed so that the page will show up as a blank page after the alloted time, which prevents others from just taking your landing page URL. You can currently set the expiration time frame to go from 15 minutes all the way to 1 year. Or, of course, you also have the option to turn off this feature if you choose to.