Let's say you are building a marketplace where content needs to come from 2+ parties (say a dating website, or a eCommerce marketplace). These kind of website structures are hard because the users create the content, and if you didn't have users, you didn't content, and then if you didn't have content, you don't have the users.
Therefore, if you are operating a website like this, it makes sense for you to "fake" the content to entertain your visitors. However, it is easy to get out of hand with this kind of tactic, so take it easy.
Here's a good example of how creating fake content has resulted badly: http://www.reuters.com/article/2013/11/25/net-us-usa-florida-match-idUSBRE9AO0Y420131125