I remember when it came out, Nintendo had an offer where you could get a free copy if you sent in the UPC code from your SNES box and a receipt showing you bought a SNES within a certain 3 month period.

I had gotten my SNES in early 1992, so I wasn't eligible. But I had only recently bought a Sega Genesis.

On the receipt it just said "video game system", so I used a Genesis receipt to get a free copy of All Stars. And it worked.