[jaddison]

If the content/information exists elsewhere but just needs aggregation, you need to massage/import in order for it to be useful to you future users - so take the plunge and import it so that users will find your service useful, even if this costs you some money up front!

If it's a matter of requiring users to generate your content for your site (like www.reddit.com), then definitely as other users have said... fake it.