Thank you for such an informative post.

Thanks again @Brian_Johnson_. I'm managing two different domains. The QSP Data element works for domain1, and your guidance helped me get to the right place. Domain2 adds a subdomain once the user goes into the commerce section of the site. There must be something disrupting the users session when m...

Thanks @Brian_Johnson_. Would it be the same session if the user is redirected to alternative payment type domain, such as paypal, in the same tab?

If user clicks on our ad and QSP ?ex_id=123456 is appended to the URL of our landing page, is Launch able to store that QSP? I want to later retrieve that same QSP value from the landing page at the point of purchase, in the same browsing session, and insert that value in a parameter of a marketing ...