Fintech company Acorns is offering to give away thousands in cash from a vending machine in Chicago during a three-day investment promotion. The company's compounding vending machine replaces potato chips with simulated investments, dispensing up to $15 in cash for a $1 fee, providing a 30-year return in 30 seconds. While the money is free, Acorns hopes to encourage reinvestment, offering a matching amount to open an account. The promotion will run for three days or until the cash is gone, whichever comes first. The micro-investing platform, launched in 2014, helps 14 million people save and invest over $30 billion through “spare change” The company also offers recurring investment plans that can draw a small daily amount from your bank account and into your investment portfolio.