Gifting my idea - use piezoelectric effect to harvest electric power for mining. It may be suitable for those who are in fitness business and own clubs with fitness machines that can be attached to piezoelectric generators which in turn charge the batteries for mining, or, you can partnership with such business for mutual benefit. Sure, this requires initial investments, but if you're targeting mining at commercial-scale, money will pay off. Other positive side of this is the possibility to have such alternative electricity literally in any geographical place.
Cool! This is a very smart idea - let slimming lose their weight and at the same time extract electricity for mining!
A very close theme was in one of the Black Mirror series.
