Each Pay & Earn merchant has a Miles Per Dollar (MPD) earning rate. You will earn the full amount you've paid on your card multiplied by the MPD rate. In the example below, the MPD rate is 10 and you would earn 1000 Max Miles for a $100 payment. Related ArticlesHow does Pay & Earn work?Which brands can I earn Max Miles at?I see a merchant on heymax, does that mean I'll earn Max Miles with this merchant?Is there a limit to how many Max Miles I can earn from this campaign?If I spend in a foreign currency, how many Max Miles would I earn?