In the parent's example the reddit post blew up so presumably the people making and upvoting puns came from /r/all, not /r/space. This is why some subreddits ha

In the parent's example the reddit post blew up so presumably the people making and upvoting puns came from /r/all, not /r/space. This is why some subreddits have opted to exclude themselves from /r/all (which comes with other downsides).