OP,

If you fly 30,000+ within the next 12 months (even including the 17000 you will be doing soon)....chances are MPC will automatically enroll you into MPC SL anyways. They do track AM passengers and target those that flew more than 30k a year.

Sort of like cxfan1960's case, but minus the CX Amex card portion.

Save yourself that $50 USD.