I noticed that a lot of the most-viewed/discussed/whatever things uploaded to scribd were collections of humorous pictures, or widely-circulated jokes, or whatever. In other words, recycled humor content that's been on the Internet for quite a while. The most common purpose for coming to scribd seems to be getting some cheap yuks.

Well, stuff like that has been around since 1996 and even before that through forwarded emails.

If you worked hard on something and then your users used it in ways that made your application isomorphic to something really boring and played out, would you be disappointed?