it's still profitable to buy Z9 or A9 ?
i have almost free electricity (0.02-0.03$ per kwh)
is it possible to achieve Payback under 4 month?
any advice?
with that cheap electricity you buy
8 Antminer S9j-14.5TH/s
for the price 1 z9
much better deal....in 1 month time z9 not make $20 a day
and s9j make more than that