Pre-paid gift cards have been around for years, and social gaming companies began offering them since 2009 — Facebook has followed suite as it has expanded Credits this year. It introduced its own, Credits-branded cards to retailer Target at the beginning of September.

Today, it is expanding the cards to electronics and appliance retailer Best Buy and top retailer Walmart.

The significance is that users have another way to buy Credits — while they’re doing relevant activities like shopping for a new computer to use Facebook and social games on, possibly. Facebook has more generally tried to offer as many payment options as possible for Credits, as additional volume means more revenue for third party developers, and for itself, as it takes a 30% cut of Credits fees.