Value of "nonresearch articles" section in PNAS I noticed that PNAS website contains the section for the so-called "nonresearch articles" (original orthography is retained), otherwise referred to as "collected articles": http://www.pnas.org/site/misc/collectedpapers.xhtml. Upon a brief look at the section and its categories, it seems that articles published there range from "core concepts" articles (somewhat similar to a brief Wikipedia article) to a topic or field review articles and beyond (papers, based on symposiums and other events).

My question is twofold:


what is the level of acceptance, if known, for articles, targeting the above-mentioned section;
what is the scientific, academic and career value of publishing in that PNAS' section (in other words, is it worth considering targeting this outlet [particularly, for a beginning researcher])?
I had a look at the latest collection paper (Megafauna and ecosystem function from the Pleistocene to the Anthropocene). This turned out to be a PNAS Direct Submission, which appears to be a pretty standard peer-review process and definitely the standard way to submit papers to PNAS ("Direct Submissions now account for more than 95% of papers submitted and 78% of papers published in PNAS"). I couldn't find out any sort of invitation for collected papers, so my guess is that these are papers that have already been published through standard peer-review, which have been grouped after the fact by PNAS editors. So this isn't a "PNAS section", but just a thematic collection of papers that have been normally published in PNAS (which, in 2014, had an acceptance rate of 17%).