Computing for Good is a fascinating project where you donate your spare CPU cycles to solve research problems and you get paid for doing so.
This is an example of spare time leading to money (paid in Ripples, a digital currency) and also art (presuming that scientific research on massively distributed social computer power is art).
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Perhaps something like this when the 13moon calender in guiding principle; eventually there will be no money, except you are money and will be updated with numbers every 28 to do with what you wish {plan-et}; for example you want new style clothes then plan the order etc.