It's nice that you've added an editorial to the newsletter, but in that case why not create a subject on the forum where replies to it could be posted?
Specifically in this case, I think that people who read the OCC newsletter are people who don't need to be told to get a good PSU.
But I've used generic PSU's for many years (now using Topower, which isn't well known, but isn't generic), and they've worked fine for me. If you don't overtax your PC and its top power requirement is 150W or less they can work fine, and for the majority of users they do. I've known quite a few people who've been using the same PC with a generic PSU for quite a few years (my father, for example) with no issue. I don't think the inefficiency when the PC takes under 50W most of the time mounts to much even after all these years.
Also regarding PSU brands, different parts of the world have different brands. If it's hard to find many reviews for a product, it could just mean that it's not sold in the US. It could also mean that the manufacturer didn't send one for review to major sites or, as the editorial said: "The review sites [either] don't want them because they know how they'll perform", a sentence that made me want to puke. Either case reflects more on tech journalism than on manufacturers.