I'd be interested to know for sure if the guy was actually running GPU or CPU based miners, but I suspect he probably was just running a CPU miner on everything

I'd be interested to know for sure if the guy was actually running GPU or CPU based miners, but I suspect he probably was just running a CPU miner on everything he could get his hands on and hoping the return on the inefficient approach could be overcome by volume. Likely now he'll lose his source of income and get a lesson on risk v reward. C'est la vie.