when you are 6 months late and 100% ROI has gone from hours to months during that 'gap' people have a right to bitch........
Hours lol, how much do you think BTC was worth 6mths ago to support you claim?
corrected to reflect days instead of hours. still a long way away from the ROI it will be when/if regular customers are seeking it from the units that were promised to be delivered in october.
BTC was worth the same then as it is now, 1 BTC = 1 BTC. meaning if one invested BTC to acquire a device that allows them 'produce' BTC then that is how their ROI would factor.