Many miners buy purpose built servers for crypto mining.
> Was there not enough warning before the changes?
That's the main plaint of the article, and reiterated multiple times. The article claims that the prices was dropped with 2 of the forks, each time it was promised (including at the very beginning) that changes would never be made. Each fork seemed to be of gain to the people who were part of the ICO, but at an income loss to miners. There were several broken promises of no further forks.