If I'm understanding what you are proposing, you are going to take the money not used for groceries and buy the Disney gift cards, is that correct? With Dollarama you need to make the purchase with a linked Mastercard so paying with cash would not work.So is mine, just from reading it all! LOL Thanks to you and everyone else for breaking it all down for us!
I think I have a plan. It's so easy to get miles at dollarma - we are in walking distance to one and pop by there often to grab this or that. I have optimum points to use so I will do the "pay for groceries with my points, use my grocery $ for disney gift card" plan and get them at dollarama instead of the grocery store when I redeem my points.
You may mean exactly that and I'm reading it wrong but I thought I would clarify just in case.
Happy shopping!