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That's just it.  These kinds of sites are the reason the Panda update was created.

There is no amount of posts / day that makes a website look natural. 1,000 per day looks as natural as 1 per month, given the content of a website that produces content at either of those respective intervals. As Keri mentions in response to your other question about auto-posting: the key to great SEO results is well marketed, great content.

Thanks great replies!