Has someone already asked for a refund at this late stage of developement?
Boom! Another one bites the dust.Those who ask for a refund now at least get their investment back, those who don't will be most likely looking at a negative ROI. Gonna be interesting to watch.
Mining = 100% ROI in 4 - infinity months
what econ class did you take? that's not ROI that's simply getting your money, back, breaking even. There is no ROI in term of BTC gained unless you are mining lower difficulty alts and selling them for a good price on the exchange.