One example:
In the early days of Conway's KFI show, he'd send out mugs to people who played (and won a round of) What the Hell Did Jesse Jackson Say?
They would mail them since most people in LA/OC didn't want to drive 2+ hours round trip to pick up a mug in Burbank during business hours. So, I can't help but wonder if mailing the prize is more common in LA than, say, my hometown market of Salt Lake City where contest winners were always expected to pick up the prize at the station in person.