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At PaidContent, Rafat Ali picked up this interesting fact from a perfunctory USA Today profile of Arianna Huffington: Her company, The Huffington Post, has raised another $5 million in financing. With blogging companies in vogue with big media, though, that strikes me as small change. Huffington doesn't even pay most of her celebrity bloggers, so it's not clear what she would need the money for. But one wonders why she didn't take more money off the table. Could it be that, despite all the buzz, the Post's blog-for-free business model isn't all that hot?