Somehow after all these years reddit never got their search to work. You can paste a comment word for word in the search and reddit won't find it.
They're dependent on google.
Also if they somehow figure out search to work, it will be ruined because of users gaming the search system with SEO.
> However, the argument that Reddit can build a better search than Google is a flawed argument. And that flaw is the same flaw that makes Google results bad. And that flaw is money. [1]