Even with this increase . average ROI is below 150 days right now
You sure about that?
https://docs.google.com/spreadsheets/d/1YmYIx2C_g035Rm_sLsFckgvcBSFBXBqcaB78epKECls/pubhtml?gid=209230657&single=true&widget=true&headers=false
Did you included future increases in diff?
He states it exactly: ROI is below 150 days RIGHT NOW. As nobody knows what will be next difficulty increases there is no sense trying to estimate them. But the current ROI as it is now is nice way to assess the hashnest prices. About 150 days gives good buffer to ROI before halving.
That is the dumbest way to calculate ROI I have ever heard. It does absolutely no good to calculate when a device hits a positive ROI without factoring in difficulty adjustments. No one knows what the next difficulty will be, but it isn't 0, it will def be over 8%. After that, its hard to tell, but the trend has been easily over 5% every 2 weeks.
You will go broke quickly without factoring in difficulty or halving guesses.
