Sso it is fair to assume Baikal has been hashing cryptonight since November. Now what would YOU do if you were baikal, facing the hard fork? We know the X10 is ASIC's, not FPGA's, we don't know about the Giant-N (yet; I might take it apart), but assuming the Giant-N is ASIC, then the obvious thing for Baikal to do would be to switch all their (hundreds) of Giant-N machines to Monero (off of all other cryptonight coins), and set up some master nodes and gain 51% of the network hash rate.
The Baikal scumbags have been mining since September '17, I think bitmain also hopped on in January '18. If monero didn't announce the
Fork, Im sure these 2 scumbags would still be quietly mining 75% of all the new monero blocks without saying a word. You can figure this out easy because 75% of the monero blocks don't go to any known pools anymore.