Daniel Perron / Getty Images Ebay might have rejected (1) GameStop's (NYSE: GME) takeover bid, but the meme stock retailer is still moving ahead with its somewhat unusual revenue-gathering strategies. The company is riding the wave of Pokémon hysteria, selling presorted packs of cards for as much as $5,000 each. If you're doing the math at home, that is just under a 100,000% markup on a pack's suggested retail price. It's the sort of gamble that makes Vegas look like a sure thing.