In 2017, there were many "futures" markets that allowed market participants to price the value of various fork-coins, and the owners of mining equipment ("hashers") likely saw that mining on the NYA/BTC1 would not be in their best interest.
It wasn't because of the
futures fake markets but because they saw that going ahead with the hard fork part of SegWit2x would split bitcoin and it was not in their best interest. Believe it or not miners have a bigger stake in bitcoin since they both invest in equipment and bitcoin at the same time. Unlike nodes ore regular users who many not even own any bitcoin (anything at stake).
~ a good next step would be to encourage reputable exchanges to open futures markets for both "for" and "against" forks for a BIP, and hope that the result will change minds.
Proposals should be discussed and then approved/rejected based on their merits not based on what the
market (day traders who only care about their short term profit) think. Keep in mind that it is very easy to manipulate the market price on a centralized exchange specially when not enough people turn to that option.