Hey Sean, Thanks for the replies.
I have two emails, "Affiliate program changes" on 8/27 and "Affiliate payout status" on 9/16, and neither mentions anything about URLs. Was there another one that I missed?
And based on your two replies, www.opalstack.com?lmref=x links are currently working, but www.opalstack.com?via=x are not (yet). Is that correct?