Trimming dead posts regularly.

NSFW communities have an interesting quirk which is that a large number of people sort by top all. If you find a new community, you want to find out what is the best it offers. You do this typically by sorta by top all.

However, with people deleting posts, or links breaking, top all is sometimes plagued with empty posts, and it can be frustrating trying to explore this new community, especially if it's more niche.