Jennifer: There are serious collectors who have Air Miles credit cards. Then there are casual collectors who collect odd miles from certain supermarkets, drugstores, and liquor stores. If you shop there, you only have a choice of collecting or not collecting, not of collecting via another program. At 1 point per $15-$20  purchase rounded down (plus occasional bonus points), it is a slow process. I managed to cash in for 2 short-haul flight, and after I get enough points to cash in for my 3rd flight I may switch to the less lucrative but  more certain Cash Miles.