This was an ad in Geek mag, Give them your mailing address and email and they’ll send you a T-shirt(L or XL) and a copy of Geek 411 mag. Says 4 to 6 weeks for delivery.
You will receive your t-shirt in the next 4-6 weeks. The next issue of Geek 411 Magazine, a bi-annual publication, will be mailed to you.