Ferrari, when did Amex have a link with AC's Aeroplan points program? It has always been CP's CanadianPlus that was the primary FF program in Canada. Now we are left with DL and CO as places to put these points, or Starwood but at a very poor exchange rate. [And of course, Amex's own somewhat inferior to its US program credit towards purchase of tickets.]

But Ken Hamer is on to something too, since we get 1.5 points (Amex Plat Canada) per Cdn$ and this converts at a 1:1 ratio to points in both US programs. That's almost twice the points per dollar than is given by Amex in the US, or by Visa and Mastercards associated with airline programs. As ozstamps points out, maybe there is one good thing in having a weak currency.