Yes, they were selling the copper on kilograms.
But it is not because it is not profitable anymore, you did not read well. They are just doing that with the old equipment, not the new one.
That notice was badwritten, and it confused a lot of people already
I heard recently that some miners were selling their rigs at scrap metal prices to try to make up for losses, as mining was becoming/had become non-profitable. If true, of course, it doesn't mean all miners, and it could be that they were only scrapping certain machines, like older models. In of itself, I don't think this spells the "end" of Bitcoin... if it was happening on a massive scale, and prices continued to drop, it could be a contributing factor to some negative effect, but not the only component, and not (necessarily) the end.
The Cyberius team.