Why is it so difficult to locate a Koodo Prepaid SIM card? These things are very scarce. I've tried the local MobileShop, Walmart, Futureshop, and BestBuy mobile. I don't have a credit card so buying one online is not an option. I would think that Koodo would make it easier for people to join but that is not the case that I am finding. Is there a secret knock that I'm not aware of?