What's the underlying fare basis? If a Y-up, beware. My wife and I flew whar may be a similar "I" fare, YYZ-MEX-EZE, in Nov., 2017. Tickets were purchased on AM website. I added our SM numbers to the res., but neglected to verify when the boarding passes were issued.
Bottom line, we never received the "I" fare MQM bonus, despite several attempts with DL to do so, and the boarding passes showing an "I" fare, and sending copies of the BPs, and Amex statement, showing that I had purchased an "I" fare. The underlying fare basis code was
"Q" or something like that and, because it was an AM issued ticket, DL claimed they couldn't help.