You can put me in the "doesn't want to pay for content" box when it comes to science. Science, including computer science works best when new discoveries are spread far and wide free of charge. Journals make their money by securing publication rights in exchange for deciding that something is important enough. Once, it was difficult to publish information to a wide audience, but in the web age, journals seem like a bit of a scam to me.
The curation job still needs paying for, but I think it's pretty clear that the ACM and others have strayed from that to trying to squeeze the long tail for as much money as they can can get.
