I think it's a different situation. BTX is not a fork in the blockchain of BTC like BCH and BTG and has not the same exposure.
I really don't think a site, which pure purpose is IMHO to list and track the specifics of different coins, should start being judge of what counts as something or not. Because if they start to act like this, they begin being a judge or referee and make decision for the whole market. That's too much power for any party and is strictly against the decentralized concept being free of any regulating institutions of cryptocurrencies at all.