First of all, you won't be able to withdraw any winnings that you make with your free play balance. This is because the free play balance isn't real money, it's just a way for the bookies to get you started.
How do You Get Paid? Spin for Cash requires that you collect at least 10,000,000 tokens orR$100 to be able to cash out via PayPal or Amazon gift cards. If you are lucky enough to meet the requirements, open your cash or tokens, balance and follow the instructions.