Where is that figure from? You're probably looking at mining pools, which don't actually own the hardware - individual miners do. A pool is just a service that coordinates many miners to work together and split the rewards. If a pool tried to behave maliciously, miners would simply switch to another pool and the pool would quickly lose its hashrate.
Competitive ASIC miners are manufactured by only a few companies. It's not inconceivable that they could use TC to lock them to specific pools or simply refuse to sell ASICs to the general public.
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Where is that figure from? You're probably looking at mining pools, which don't actually own the hardware - individual miners do. A pool is just a service that coordinates many miners to work together and split the rewards. If a pool tried to behave maliciously, miners would simply switch to another pool and the pool would quickly lose its hashrate.
The problem isn't pools but manufacturers.
Competitive ASIC miners are manufactured by only a few companies. It's not inconceivable that they could use TC to lock them to specific pools or simply refuse to sell ASICs to the general public.