Bunch of kneejerk and unaware answers to a complex question. This has become the norm for BCT unfortunately. Not being associated with a GPU manufacturer, I can state at least two reasons why miners are not appreciated by GPU manufacturers. Manufacturers estimate a specific number of returns for repairs/refurbishment, etc of their retail version of GPUs. Use of retail GPUs in a mining setting ultimately increases demand for RMA support, and I am sure hurts their bottom line.

Miners create a shortage for cards, where retail users who buy the cards, then go out and buy games and other software help GPU manufacturer's business dealings with software vendors. There is a larger ecosystem and low supply of retail cards to actual retail users hurts that ecosystem. When Timmy can't buy his GPU to go out and play Warzone, he won't spend money on in-game purchases, he may ultimately stop buying games, or even quit gaming on the PC. Forward looking GPU manufacturers could easily see this, and would ultimately want to kick miners off the retail GPU purchase chain.