4. Beanie Babies
Company: Ty Warner Inc.
We remember Beanie Babies as little more than a strange fad only 20 years after they hit the market, but there was serious money in Ty Warner's beanbag animal brand. Ty Inc. made more than $6 billion during the Beanie Babies heyday, largely thanks to the firm's savvy business acumen. Anything this popular is sure to inspire copycats, but counterfeiting of Beanie Babies got so out of hand that the FBI had to make a concerted effort to crack down on Beanie crime in the late '90s.