Shop.ca is having a rather ridiculous promotion: using the promo code ‘TD’, you will get $50 off your purchase, with no minimum spend + 3,000 Aeroplan points when you link your Aeroplan number. You have to use a TD Aeroplan Visa, however, it looks like some non-Aeroplan branded TD Visas might work. As of right now, I could only get this to work once. Your final cost has to be at least 1 cent over $50, or the credit card won’t authorize (they tried to charge $99,999 on my’n!).
I don’t expect this will last very long – it’s quite a dumb promotion, and is an easy way to get 3,000 Aeroplan points, and in my case, super-cheap towels!