Buying PFC at AllCrypt, depositing to HashProfit and buying KHs with PFC seems to be best. But promo codes are not bad either. Use HPE241214.
This promo code doesn't work, unfortunatelly.
But anyway I'll try to buy PFC at c-cex.com (the price right now is only 0.0006 btc = 1 pfc) and then buy KHs on hashprofit.com.
I can buy 200 KHs for 0.01BTC. The ROI is about 5 days
If HP will not collapse today, of course.