That email address is provided to Contant Contact, a digital marketing platform, for the sole purpose of emailing users about upcoming Cardboard Promotions events
Situation: I bought a 1st Edition Mewtwo, Zapdos, Nidoking, and Ninetales from an individual who has kept these cards (along with many others) in a family photo binder since the early 2000s
Each pack contains 7 cards + 1 foil card
Today, most counterfeit cards are designed to pass various tests like the bend test and the light test, and some look almost exactly like the real thing, even upon close inspection (unless you're going really deep and using a jeweler's loupe, which is a good way to weed out fakes but too much work for the average player)
WotC's Matt Tabak explains in his Doctor Who Mechanics article: If multiple players are offered a villainous choice, the first opponent in turn order makes their choice, then that effect happens
Its a lot like an Expedition Map that you dont have to use an actual spell slot on, though Urza's Cave offers limited utility until you crack it