Free Wired Subscription

“Discount Mags is proud to offer you a free complimentary 1-year subscription to Wired magazine. Please allow up to 14 weeks for the arrival of your first issue. Offer subject to availability. We will do our best to take this offer down once our quota has been met. Your address will not be distributed to any 3rd party whatsoever. Your address is used solely for the magazine subscription.”

This offer is propagating broadly around the web. Can anyone say what the catch is?