Old phones get new life in high-powered computer servers
princeton.edu
princeton.edu
If smartphone SoCs were viable server platforms then you would buy them directly from the manufacturer instead of scavenging them from a landfill.
The entire idea is based around the cognitive dissonance of buying fully functioning hardware at low or no cost when the reason for the low cost is the fact that it's not fully functioning.
The point of this is that it's recycling hardware that has already been used. Manufacturing new hardware defeats the entire point.