Event Espresso Integration / Generic Tracking Pixel?

I’m using Event Espresso as my online ticketing system. I have a number of different “co-promoters” that help to promote certain events, and get paid a commission based on the sales they generate.

There is no integration plug-in for event espresso that I see listed, and that’s fine. My needs are actually pretty basic, I just need to track when a visitor from one of the affiliate links actually buys a ticket.

Is there some way that I can just add some sort of short-code of tracking pixel to the “thank you” page that will simply count how many tickets that affiliate was responsible for? Basically counting hits of that specific page.

I can then easily just take that number and multiply it by my per-ticket commission rate and pay them out manually.