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Can you explain this to me in more detail? I need to stay ahead of all crypto info. Thanks!

The payout reduces everyday by an average of 2-3% depending on the coin. It has to do with the mining difficulty. So basically you can't get ROI and you would have been better off just buying coins and holding instead. The only people who make money are the bloggers that convince everyone its a great idea and get loads of people using their code