Neither did many of the miners. There was pretty famously a near-universal shortage of GPUs for several years because crypto miners were buying so many cards - online, direct from the manufacturer, even big box stores; they drained them all. Most of those would be indistinguishable from a normal purchase (a lot of miners only bought one or two cards; there were just a lot of crypto bros looking to get rich).
Neither did many of the miners. There was pretty famously a near-universal shortage of GPUs for several years because crypto miners were buying so many cards - online, direct from the manufacturer, even big box stores; they drained them all. Most of those would be indistinguishable from a normal purchase (a lot of miners only bought one or two cards; there were just a lot of crypto bros looking to get rich).
Except nivdia was prioritizing crypto sales
https://www.tweaktown.com/news/76468/cant-buy-new-ampere-gpu-thats-because-nvidia-sold-them-to-miners/index.html
Sure a number were sold through gaming distribution handles, but that was more scalpers than crypto I suspect.
All the crypto farms were buying in bulk