CN coins need a hard fork to change the algo or the CN algo will gonna die for gpu mining.
I agree that bitmain wants to compromize the main feature of crypto currencies by centralizing the power.
Not sure if they are doing it intentionally, but given their position; I think its a matter of inevitability. When you come up with an invention, you'd be stupid to not use it yourself. I'd say much of Bitmain's
profit comes from mining and not actually selling their rigs. But that's a hypothesis. Otherwise, they'd end up like KNC or Butterfly Labs.
In my opinion you are right. If no one knows about the release of a new ASIC they can mine away crazy amounts without anyone being any wiser. As soon as they mention they are going to sell it, devs will try and fork. I think they had these some time ago but now they know that a new fork is coming they are trying to sell them.
It will be interesting to see if how much hashpower will drop from monero and other popular coins like electroneum once they fork
