At first I thought that would be a problem, and maybe some people are just yanking content off Reddit, but the frontpage of Reddit and the frontpage of Snapzu don't usually share too many stories. Of course some of the big news items will show up on both, Reddit and Snapzu are content aggregation websites after all, but I haven't gotten the impression so far that there is a lot of content overlap. Like I said, I use Reddit mostly for the niche communities that don't exist here yet, so I'm sure that's one reason I don't seem to have that perception.