Most funny sites use a lot of effort for their humor, making flash animations, comics, stuff like that.
Most of us are pretty much restricted to text and maybe some images, and text has to work in certain ways to work in terms of funniness...

It's kind of like telling jokes. They'll be perceived as less funny if they're introduced by something like "i'll tell you a joke it's teh best joke ever okay here goes:"
People complained about something like this in a thread about "The Ultimate Showdown of Ultimate Destiny".

That's just the way I perceive it. I'd be surprised if nobody even understands that view...