(NEWSER) - Casinos are making big bank off the tiniest—and oft-most derided—denomination, USA Today reports. Gambling outfits have added penny slots at an amazing rate—in the last 2 years, Nevada has removed 12,000 more costly machines to make room for 7,000 penny slots—and the move has paid off. In Missouri, for example, penny bets make up 42% of the total and a whopping 63% of casino profits. More»