Hi guys, since the issue has been resolved, as requested, the thread has been locked. For additional information, please refer to the article › How does the Marketplace affiliate program work?
If the URL already has a ? character in it and some code at the end, then you have to append this code instead &ref=username. So in other words you are replacing the ? with an & character. That’s because the ? tells the system that some variables are about to come next and then each variable and value is separated by an & character so the system can identify each one separately. read more
Or, simply use the › Referral Link Generator