Earlier quoted context omitted.
They can always just stop using Reddit. Digg went this way, too, and it ended badly for them.
Was digg as big as reddit is now? The issue for me is I don't know of other good places for long-form discussion and good link aggregation in general. Most of the time in smaller subreddits there aren't really any issues. What alternative is there to /r/AskHistorians? Etc.
I mean, their tagline "the front page of the Internet" screams arrogance to me, in the face of what Tim Berners-Lee envisioned the Internet to be, and yet it's probably not wrong at this point.