theres no such thing as a CPU only algo
if something LOOKS like its being mined by CPUs only, you just havent FOUND the GPUs yet
exactly
It's technically correct there are no "CPU only" algos, but economically there are. Some algos
can't exploit the advantages of GPUs, ie massive parallelism. Algos that use a large amount
of memory per thread would severely limit the number of threads that can run on a GPU reducing
the efficiency below that of a CPU.
As far as that rplant link, I don't know what that means. The pool has no way of knowing what
hardware is mining, they only have the agent id from the miner that can show anything the user wants.
That being said I did see an agent id that indicated an experimental version of ccminer. I consider that
slightly more reliable although, as I said, it's easy to manipulate.