Well folks,
I must agree that this mystery publisher is completely out of line in expecting preferred treatment in exchange for promo products, but there are two points I must address:
1.> It wasn't stated explicitly, but the wording of the email seems weird. 'it seems you were not informed of our policy' or some such...
Sounds to me like a reply to someone asking for promo material. If, and only if, that reviewer has a habit of contacting publishers and saying 'hey, send me a free copy and ill post a review of it on enworld!' and then gets into the habit of trashing some of that material, I think the attitude of the publisher is understandable, if still unjustified. If, on the other hand, the relationship with that publisher and the reviewer is a more traditional book review set up, where the publisher contacts the reviewer and says 'hey, weve got a new book and value your opinion and respect the weight your opinions carry, heres a copy for you to review and enjoy' and then they get mad because they get 'dissed', oh well, that's their problem. Honestly though, as I said, the verbiage of their email makes me wonder about how this publisher's relationship with this reviewer works. (NOTE, I am commenting ONLY on this email and the reviewer in question, this is NOT a disparagement of ENWorld or its reviews policy, thank you

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2> Reposting private email to a public forum is extremely bad netiquette and very unprofessional, no matter who the guilty party is.