How to create a custom "sales-tracking" link for an item

Hey guys,

Do you have any idea about how to keep track of the sales of an item generated via a certain link?

Let’s say I want to promote an item on Facebook and I would like to know how many sales the link drove.

!Important: the link should be cookie-based so I can track the sales for the course of let’s say, 30 days.

In the past, things were pretty straight forward I think, bundling the ?ref=yourusername with &utm_source or &utm_medium - these values would’ve show up in the Google Analytics and you could’ve track the sales based on the utm parameters.

Since ImpactRadius, things got a little complicated.

How do you guys do that?

Thanks!
Madalin Tudose
DeliciousThemes