Google Answers used to be a thing. You'd ask a question, and an expert would respond for a tip. The bigger the tip, the better the answer.
https://en.wikipedia.org/wiki/Google_Answers
I wonder if that dataset is being used. The dataset would be uniquely high quality and exactly what the LLMs are made to do.
The tips were prominently displayed. If they were also included in the data set, this might explain things.