Regardless, it's only some letters, all it signals is their intent to support the hard fork when it happens.
Im not sure what they are playing at, but stay alert, the scammers will try to make you think B2X is BTC and you may lose your coins.
Oh come on, how is a mining pool going to make you lose your coins? What are they going to do, make everyone send their coins to the mining pool and then give you back only the new chain? All they're doing is supporting an agreement which they are still part of.