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So people might come up with the idea of proxying this decision-making. This might put the decision-making into too few hands, of course, and all the decentralization is down the drain.
I don't think this is a good idea, therefore.
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In a way, this has already happened. Surely the three (or so) largest pools already constitute exactly what you have described.
True. I think this is not a good situation.
I've seen in other threads that some people think mining in a bigger pool is more profitable. Pretty sad... there's so many small pools that'd deserve to become medium-sized.