I have gotten a number of rewrite requests to "dumb down" the vocab in my essays for ESL clients; however, none of these requests have been about grammar. This experience suggests that there may be a significant niche for writers who can pretend to not write well in English, but who can still keep within the basic rules. Of course, those who haven't mastered the basic rules will still be left on the margins, and that's as it should be. Hiring someone with subpar English skills on purpose to manufacture faulty essays seems foolhardy. Judging by munywab's language used in these posts, it may also be indicative of the lazy nepotism that ruins so many small businesses.
Of course, that's assuming that s/he actually has a company, which seems, in the absence of a company's identifiers being given, a little bit of a leap.