There's no evidence the anonymous operators of GHash exercised any of those abilities.
Which means it didn't happen. It would be blatantly obvious to watch whenever GHash was mining on the 'wrong' chain to try to make it win. Even if GHash had 80% of the mining power, about one in 25 blocks would see non-GHash miners win twice in a row and unarguably expose this behavior as GHash ignored them.
And when it does happen? (It's a when, not an if.)
I don't think people will like their financial system unfairly tampered with.
People say, "Why would Ghash do that? They profit from the system they'd be manipulating." Well, so did Mt. Gox, and it didn't stop them from manipulating it anyway.
Also even if another pool won twice in a row it wouldn't matter. Over the next few blocks ghash's blockchain would become longer and all bitcoin clients would accept it.
Oh well 0 confirmation has a lot of issues. But thanks for the info.
What I'm saying with the double-win is that it blatantly exposes GHash's ignoring of blocks they don't like, not that they would actually lose over time.
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Which means it didn't happen. It would be blatantly obvious to watch whenever GHash was mining on the 'wrong' chain to try to make it win. Even if GHash had 80% of the mining power, about one in 25 blocks would see non-GHash miners win twice in a row and unarguably expose this behavior as GHash ignored them.
And when it does happen? (It's a when, not an if.)
I don't think people will like their financial system unfairly tampered with.
People say, "Why would Ghash do that? They profit from the system they'd be manipulating." Well, so did Mt. Gox, and it didn't stop them from manipulating it anyway.
Why is it a when, not an if? It would hurt their ongoing profits so much to do it.
But to answer when, I'd say probably after getting at least 60 percent of the network to control it comfortably without instability and slowdowns.
ghash has been caught before abusing 0 confirmation betting with double spend. https://bitcointalk.org/index.php?topic=327767.0
Also even if another pool won twice in a row it wouldn't matter. Over the next few blocks ghash's blockchain would become longer and all bitcoin clients would accept it.
Oh well 0 confirmation has a lot of issues. But thanks for the info.
What I'm saying with the double-win is that it blatantly exposes GHash's ignoring of blocks they don't like, not that they would actually lose over time.