We've see ViaBTC recently saying this:
Note that ViaBTC are coming from a very different angle to most of these other groups that are making choices about SegWit2x. For most of these groups, it's either BTC or SegWit2x, but in ViaBTC's case BCH is what they primarily support.
With ViaBTC down, supposed hashrate support for 2x is down to 70%
Their original intention was to have a much higher amount of hashrate than that. I suppose they've got almost nowhere to go but down from here if people keep losing faith.
That said, it looks like the amount of support SegWit2x is losing is still not quite as dramatic as it's being presented. It's going to require most of the major players, including BITMAIN, to back down for it to become less relevant. For now, it's still a very significant event and there's not long left to go.