Ziggy was an old school XM'er. Ran one of the old XM message boards. Started MyRadioStore, selling XM radios, accessories, antennas, and printed shirts for almost every channel at the time. MyRadioStore was one of the first advertisers on the show back then. The business grew, but after the merger he didn't much care about the whole Satellite Radio craze anymore and sold the business to one of his competitors.
When Opie's brother decided his unemployment checks were drying up, he would design a new O&A shirt. Then, Ziggy would offer to buy the entire run to sell on MyRadioStore. That's why there were so many dumb shirts back then. Every new design was an insta-sell out for him, it was Ziggy's problem now.
Amazing artwork, though. A true talent.
There was never any issues between XM & Ziggy/MyRadioStore.