Limit Popup Display Frequency per Session

Hi Guys,

This plugin is great, however I need to be able to limit the number of times the Upsell Popup is allowed to appear in a session.

It’s currently appearing every single time a user clicks “Add to Cart” on a product page. This gets really tiring to have to “X” out of the pop up each and every time.

Can you advise how I can limit it to appear only once in a session? Without this, I cannot use this plugin 🙁

Thank you.