Thanks for the feedback. This was mostly a personal solution of mine. I am trying to gauge if it would be useful enough for others to expand and promote.
Not sure if that's the correct amount, but its definitely in the billions. Seems like a good idea except when you try and pair items with giftcards that have a balance of less than $2.00. The problem is real, not sure if this is the solution.
You'd have to adjust for supply and demand, I may only be able to get 80 cents of Best Buy credit for every dollar of Walmart I offload.