I havent seen any coins announce they are forking. Its pretty stupid to hate a company that saved me a ton of money. I would buy 20 1070s to mine, (I have), why would I not buy one these instead. Less power, space, heat, cost, and various other pluses. People have warehouses full of GPUs. The hate for what Bitmain does, is ridiculous when GPUs are literally doing the same thing. Except they are using more power in some cases. If you think GPU miners arent causing the same issues, then you are naive. GPUs also cost more money per hash, and is also taking away a lot from th gaming industry causing huge disruption and price hikes. If any of you built a computer that mined better then anyone else, ALL of you would use it.
They should care because the extra hashrate will cause zec price to dump since there will suddenly be way more sellers than buyers. If they care about their premine they'll switch algos.
That's not necessarily true. One reason BTC price has managed to stay so high is that people have hundreds of millions invested in hardware. When you have a lot of money invested in hardware you are financially incented not to sell at stupid low prices, which in turn tends to put upward pressure on the price.