1). Missing review copies. I contacted a publisher through Shelf Awareness with an ARC request. She replied saying that she'd send me a copy, also offering copies for a giveaway. I said, "Great, thanks! I'll post the giveaway when I post my review." Over two months later, the review copy hasn't shown up...should I e-mail the publisher about it, or just let it drop?
2) Missing giveaway wins. Earlier this (school) year, I had about six books over the course of several months that I won in giveaways but that never showed up. I e-mailed the bloggers about them, and all but two sent me another copy. The two said they'd send another copy, but these also never appeared. E-mail again, or let drop?
3) Old or new? I see a lot of the same upcoming/recent releases featured on the blogs I follow. Is it healthier (more followers and comments) for a blog to review mostly new releases or to review more books that have been sitting on the shelves for a while?
4) Phrasing. What's the most polite way to phrase a review request to publishers? I generally feel like I'm being a precocious botherer with my "Hi, I'm a book blogger and reviewer at [url], and I would like to request a review copy of [title] by [author] if copies are available. Thanks for your consideration! [mailing address].
I'd greatly appreciate any advice on these questions!