To be honest... a lot of you in this thread, naming nobody in particular, are stupid. You keep saying because a thread had a lot of likes, it should be at the top. That is not and has never been how it worked. Hence the 'stupid' part. It has always been a mixture of replies, likes, and the share options and all that. But more importantly? It has been timed based. A thread sitting there will not be there forever even if more people keep liking it. It switches the trending topics to expose people to more discussions. That has not changed and the system has worked this same way for going on three years.