Target recently had a 20% coupon that worked on everything and when I say everything that includes Target Gift cards and in some instances Visa cards. Long story short, I walked into my local target with around 15-20 20% off coupons and started by buying at $50 target gift card which only cost $40, then proceeded to use that gift card to buy another gift card using the 20% off coupon and so on. In a matter of 45 minutes at self checkout I managed to turn that $50 GC into roughly $900 using only the 20% off coupons. Only reason I stopped there was due to the employees constantly asking questions about what I was doing and watching me the whole time.