Game companies love tchotchkes. They're a quick and simple way to say: we love you, now have some crap. These are freebies, small bribes ... and if you want to see how much game writers love these products, just go check eBay.
notebooks, and faceplates for an Xbox 360. And I haven't even been trying -- there are guys who carry around carts and just walk from booth to booth collecting swag. These people are very well loved by everyone, and no one thinks they're at all pushy, obnoxious, or beastly.