I'm fairly certain approximately 100% of the people in that thread who thought the IG move was a bad idea also did absolutely nothing to bet AGAINST the move they were so sure about
in the end they were just speculators speculating
My point is not that "commenting on the internet is dumb cause it might make you look like an idiot" but the fact is that probably zero of the detractors in the HN link posted had anything other than an uninformed opinion