A Sonic themed...credit card??
It sure looks like it! This appears to be an actual Visa card (complete with that hologram bird thingy) with a Sonic Adventure 1 theme to it. You can see a logo in the upper left, and the word "international" on the right. It appears to have been issued inside that tin thing. What's going on with this? Is it a themed pre-pay card like the old phone cards? It's highly unusual.