I am trying to add a tracking id to impact radius affiliate link. I couldn't find anything about this in "Impact Radius" site so I made some research on google and find some blogs that mention about field name "subid1" that you can add to the affiliate link.
My question is, can I send anything I want in this field or I limited by something?
Thanks
You can get it worked with Vanity Urls like this.
petalcard.whij.net/your_unique_url?subId1=something&subId2=sdfsdf
Remember I is capital in subId.