Earlier quoted context omitted.
They were right about Bitcoin getting big (though I'm not aware of anyone putting their money where their mouth was), and they were a decent source of information leading up to the peak of the COVID-19 pandemic (which probably saved a handful of lives). Just because they're almost always aggressively wrong, that doesn't mean they're aggressively wrong about everything .
It does mean you probably shouldn't listen to them, because the expected value of listening to them is negative.
When there's a crisis, it's still worth checking in to see what the LessWrongers are saying about it, because it might be very useful, and it's pretty easy to tell: you just check whether it looks like they're doing science, or Rationalism™®, and only investigate further in the rare cases where it's the former.