Edit: maybe I should add that we do moderate posts that are just political, i.e. don't have an intellectually curious angle, as well as threads that depart from the path of curious discussion and sink into flames.
The reason given was "change of leadership", i.e., from Sam Altman to Geoff Ralston. Interestingly, Geoff wrote: "we are just working on launching YC China and I'll work hard to make sure Qi Lu has everything he needs to make that go well" after he was appointed, so it doesn't seem like he started out with different ideas.
