Just like the F2Pool poll showed before, public support is largely for SegWit. Miners will have to follow eventually or nothing will happen at all.
What is important is that they are actually asking, by taking a poll.
That means they are at least contemplating that they may need to
activate SegWit at some near term point.
Ultimately, due to pressures coming from many different directions,
miners like ViaBTC will need to make a final decision, but there are only
2 possible choices (since the third, do nothing, can not exist forever).
So, the question becomes, is ViaBTC and other miners willing to hardfork
the network without the support of many separate sectors? I think not.
Ultimately they will need to accept SegWit since they will never perform
a contentious hardfork on their own accord (unless it was a purposeful
attack, such as by a government or their intelligence services).