老外一样SHARE.....
Just go there together and pay the card owner afterwards with cash or check, its no problem. I have seen bounch of these deals among local Canadians or landed immigrants. This is really 无可厚非.
But take the card from the owner to shop by yourself is really dangerous. They pay special attention to Chinese? - first time I went Costco shopping 5 years ago was with one of my CHinese classmates, he borrowed the card from his friends, and he was cought. It was not a happy experience, believe me.....