My initial thought to boycott them as well. But hey, Esso is only 1 mile per every $3 spent. Nor do I want any Air Miles from Shell. I personally don't have much use for AC or Star* and their redemption chart requires much more miles than similar itinerary from Asia Miles or Avios. Guess there's really not much choice.

If my math hasn't failed on me, redeeming for Petro's gift card's still give you an effective 2.77% cashback, ontop of whatever credit card you're using.