Not just PNY... article today showing EVGA, Zotac, Asus and Colorful cards.
https://videocardz.com/newz/gpu-mining-farms-are-causing-power-outages-in-iran
Supply chains to the consumer are complex, with regional distributors, vendors and who knows how many middle men. These could be sold on bulk at above market price by any point along the chain. We will probably never find out who is doing it.
To give people an idea of scale, the 300mw consumption in that article is equivalent to a large combined cycle gas / steam turbine. Like for example one of Connah's Quay Power Station units.
This crypto mining business is just nuts!