At the Monthly offices in DC we get a lot of books. Publishers want to get their stuff as much attention as possible, so sending free advance and review copies to magazines makes good sense, even if each copy has only a tiny chance of getting a review actually written. However, sometimes this can be taken too far:
In case you can’t see, this is twenty-four copies of something called The Corruption Chronicles, some warmed-over right-wing agitprop about the president. Utterly unremarkable except how the sheer numbers inadvertently reveal just how much money is sloshing around the conservative propaganda machine. This is the cheapest of hackery, unlikely to accomplish much except a big recycling bill somewhere, yet they’ve sent a copy to just about every person that has ever worked at the Monthly. That kind of shotgun approach is expensive, and we’re not even a conservative publication! Imagine how many copies they must have sent to the National Review.
See here for more.