Speaking to a clerk at the store which contained the promo (embedded after the jump), phear3d learned that the trade-in program is being tested at certain stores over the next few months to see if the company wants to incorporate it on a wider and more permanent scale.
We spoke with a corporate Toys R Us representative, who confirmed the program is being tested "in a couple New York stores." He informed us the used games program is not occurring at the Times Square location, but wouldn't give specific locations when asked, as the company doesn't "really give information about tests going on in [its] stores." Furthermore, he couldn't discuss the details of the program, as that also falls under the purview of "testing," which the company won't elaborate on. If you've seen a sign for the program at your local store, please feel free to let us know the location and we'll try to get the details.
Hopefully, we'll see a return to the now-defunct "Geoffrey Bucks" system of the late '90s -- we've always thought the one thing missing from modern used trade practices was tangible, non-transferable paper currency.