I'm surprised that the CI market can make all this hoarding profitable. It's not like Apple will support MP6,1 forever and they have to obtain ROI around 3 years, at most. CI market needs current Xcode, the day that the current macOS release don't run with MP6,1 anymore, the MP6,1 usefulness with CI will die.It actually makes me pretty upset they've hoarded all of those. It's like the jerks who hoarded the GPUs during the stupid bitcoin mining frenzy. I'd love to see someone go liberate all of those Macs being held hostage. Also, I wonder how long they will keep them in service. They've caused the prices to become inflated by constricting the supply currently, but eventually I imagine they'll dump all of those on the used market. Their company alone was probably a major deciding factor for Apple making a rack mount version of the new Mac Pro and I assume they'll eventually buy up those to replace the 2013s.
Imagine when they have to dump all those MP6,1 on the used market, prices will go down hard and instantly.