When the user clicks through to this page (or ends up on this page), the popup is disabled by the writing of the cookie that prevents the popup triggering for that browser/device/user.
So, this might be the donations page, or a subscribe page or something.
Or
Choose your donation amount…
[paypal_wp_button_manager id=514]
[paypal_wp_button_manager id=530]
[paypal_wp_button_manager id=531]
[paypal_wp_button_manager id=532]
[paypal_wp_button_manager id=518]