POuW requires GPUs with good processors and ram with many lanes and usually 8x to 16x PCIe bus speeds.
It makes me wonder how things like dynex are real with all the GPUs are on 1x speeds.
The "POuW" stuff people actually pay for like on vast.ai are very expensive.
I did some digging and apparently DYNEX is being accused of being a scam
https://github.com/ares-austria/DynexSolve/blob/main/dynex-daniel-mattes.md.
In essence POuW are the future or should be because they would solve various problems because of the computing need , but they are a bit green from what I researched .