People so easily forget that a Jupiter may be mining BTC a grand more valuable than when paid for, but the price in BTC is still not likely to be recovered. 70BTC = 70000 dollars plus now. Why the hell would someone use BTC to buy a rig after that lesson? You'd have to be some special kind of thicko.
It's mind boggling, but commonly seen here. Bought Jupiter for 60 BTC. Mined 10. Sold for 15. Sum = -35 BTC. Profit!
I've come to recognise that from a pure ROI perspective it's really hard to beat just buying and owning BTC. Bitcoin is inherently deflationary.