If you are an academic and you publish with a famous university press, that is wonderful for your career. If you go with a vanity press, that can sink your career. That division of presses also matters in defining whether a particular issue is part of mainstream debate, or way off on the disreputable fringe.
The problem in all this, though, is that some presses are very strong and reputable within particular fields, but that fact need not be known to university authorities. I can imagine a junior professor trying to argue to a department head or dean that a title with such a firm should be counted as equal in prestige to a leading university press, and struggling to make the case. Please understand, that would not be a fair situation, but I could see it happening.
Let me take a specific example. I am currently using a book that came out from Inter-Varsity Press some fifteen years ago. It is a really excellent piece of work, scholarly and well written, and IVP is a very strong and well known publisher from the evangelical point of view. Hence my surprise, recently, when I tried unsuccessfully to find a copy in the very large and wide-ranging library at Penn State University. They had other works by this author, but not that particular title. Like many major university libraries, Penn State has standing orders with certain mainstream publishers, and acquires pretty much everything they put out. That principle does not extend to well known evangelical presses like IVP, Eerdmans, Baker, Thomas Nelson, and so on. The more library budgets shrink, the harder they cut back on any presses they don’t see as absolutely core and necessary.
In itself, that decision is not disastrous for me, because if I want a copy of the book in question I can get it through inter-library loan. But the underlying attitude demands attention. These libraries are assuming that the presses in question are not fully respectable houses for academic work, they are partisan or denominational, and therefore they do not demand the same credibility as even minor university presses.
Maybe that explains why TKNY doesn’t publish with the company that subsidized the gospel allies.
UPDATE: a multi-author 16-page tract is not a book, and I’m guessing Ross Douthat hasn’t read it.