tzoavva asked: How do they know to give you 5,000 or 10,000 if we all go to the same link?

First of all: Welcome to our board and thanks for this question!

As I wrote above “Partner Miles”, is a targeted promotion (if I reach my target), only customers who received the mailing are entitled to register for this promotion and will receive additional miles.

There are at least three individual targets:

5.000/10.000/15.000 bonus M&M miles for one Coach/Business/First Class intercontinental flight.

M&Ms intention is to mark the individual accounts that they are eligible for this targeted promotion. If this member register on the link and if he reach his individual target, than he earns the relevant bonus miles.

I know, that in the past there were some loopholes; but if one does a trip solely based on the assumption that he earns those promo miles, I would ask my M&M center, if it is possible to include me in this promotion.