Bitmain made so much money last year they simply don't know what to do this year.
So they figured WTF why not attack gpu coins.
The next few months will be very interesting to say the least.
I think I read somewhere that Bitmain probably made more then Nvidia last year.
By the time they ship in May that miner it will be pretty much a door stop. Sure there might be one or two CN coins that don't switch but certainly not enough to be profitable. It seems the crazy times of crypto never end.