They didn’t care for many years when /jailbait or /creepshots (pictures taken of women without their consent) was still a thing. It brought them traffic along with all their other porn subs
They only cared when advertisers caught wind of them & considered dropping out
From Wikipedia:
Communities devoted to explicit material saw rising popularity, and r/jailbait, which featured provocative shots of underage teenagers, became the chosen “subreddit of the year” in the “Best of reddit” user poll in 2008, and at one point, making “jailbait” the second most common search term for the site.[3] Erik Martin, general manager of Reddit, defended the subreddit by saying that such controversial pages were a consequence of allowing free speech on the site.[117]