The main advantage was get hash , mine , sell it back , the difference should be + so you make profit.
So even tough its unlikely you could still profit even if the maintanance is more the mining just by selling it for higher price and covering the loses. Tough that never happens because price usually goes lower by time rather then higher , just like used cars.
The odd thing was that for a long time (at least 2 months I'm aware of), prices of shares actually went UP week after week, despite profit dropping over the same period. Cex.io has always been a weird place economically.
