There is a Chinese counterpart/copycat of Reddit --- Tieba. It is owned by Baidu (counterpart/copycat of Google). More introduction can be found here https://en.wikipedia.org/wiki/Baidu_Tieba.

Tieba was once popular just like Reddit. Then, the management (of Baidu) figured out how to make money with Tieba and its search engine to promote brand and erase negative comments. Not much people use it anymore.

The point in the article is pretty convincing to me.