A sign that there's nothing good on the site, just people reposting the same stuff, maybe with text macros.

There's 3 new comics per week. It's not like you can sustain a whole website on that.

Nothing, but I go to xkcd.com for that. IMO, the only valid use of reposting xkcd is when the thing you're posting is pertinent to the conversation. Like if somebody's among the lucky 10,000 who hasn't heard of nerdsniping until today.