Online shopping mogul and Japanese billionaire Yusaku Maezawa will give away more than $9 million to 1,000 people on Twitter to see if it improves their happiness. All they had to do to get it was retweet him. Winners will end up with roughly $9100 each. The tech tycoon called the contest a 'serious social experiment' to see what impact $9 million could have on a person's life. More than 4 million people have retweeted and a lottery will determine the winners. Maezawa is worth an estimated $2 billion, according to Forbes, and has made a name for himself as an eclectic billionaire -- a rock musician, hopeful moon tourist and high-rolling art collector.