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If the article submitted is genuinely about the product (and is a true look at what it offers or news on it) and not full of marketing speak do you think the Search Engines would have a problem with this?
followed by the linking. Nofollow solves that in one respect because it's suggesting, "i'm not asking you to follow the link as it's not there for spam."
Just because it says nofollow doesn't mean it won't be followed, it'll mean, "i didn't mean you to follow this, but as you've found it, you might as well go and look."