Remarketing works by adding a snippet of code to your own site to put a cookie on the visitor's browser, then the display network checking for that cookie and d

Remarketing works by adding a snippet of code to your own site to put a cookie on the visitor's browser, then the display network checking for that cookie and displaying your ad if it's present. It's not possible to remarket to another site's users, even underhandedly with the assistance of the company that drops these cookies, as stripe.com hasn't tagged their own site with any of those companies' code.