ACM opens another hole in the paywall

"The ACM has not removed the author's right to self-post copies of the articles, but clearly the publisher wants to discourage that, and to be the only source for content. Furthermore, authors can use this only if they buy in to the ACM's "Author Profile" page, a feature that ACM has been pushing but that I suspect most authors don't bother with. It's an interesting strategy to capture links, or to reduce the number of copies floating around outside the control of the ACM archive. Whether it works may depend, in part, on how difficult it is for authors to use. I suspect most authors won't bother, but if you want to see some Author-Ized links in action, click here and then click on "A Theory of Indirection via Approximation." (I can't link directly from this article, because the ACM permits this service from only one Web address.) Unlike some newspapers, which are suffering badly in the Internet age, major nonprofit scholarly publishers such as the ACM are in good financial health, with a diverse array of activities and revenue sources: membership dues, conferences, refereed journals, magazines, paid job-advertisement web sites, and so on. Still, there is a lot of experimentation about how to survive as a publisher in the 21st century, and this appears to be the latest experiment...."