While I agree that controversies have an impact, where I agree with @Zaukrie (although don't want to speak for them), is that I don't think the majority of D&D players care about the controversies, or have a strong opinion either way, or even if they are aware of them at all. Most just...play D&D.
I agree with that in a lot of ways. Of my group, I'm the only one who regularly follows up on RPG news and the like. And although I'm aware of the controversies that have popped up, that doesn't mean I always have a strong opinion about them. Some seem more meaningful than others, some resonate with me, some don't.
The rest of the players in my group have no idea of what's going on behind the scenes with D&D or the larger RPG world.
Similar to Black's comments about liberals and conservatives, as if all D&D fans can be so neatly categorized on one side of the political spectrum. And even if they are, they don't necessarily care or have the same level of upset about the controversies as Black implies (e.g. not all liberals are upset about WotC's "milquetoast" attitude, and not all conservatives are raging against every change to their game). Most D&D players seem rather happy with WotC, or happy enough to keep driving record sales, and just want to play.
While this is true, there is also a vocal section of the fanbase that is demanding change. That one portion of this fanbase is unaware of the requests of another portion doesn't really matter.....because WotC seems to be aware and seems to be adjusting in response. They may not always adjust in a way that many would consider the "right" way, but they are responding. Which most likely means that they think it is good for business to do so.
Disclaimers on older products, adjustments in many longstanding elements such as racial characteristics for PCs, attempts to portray more diversity among the casts of characters in their products, attempts to diversify their design team......they've done all these things, to some extent, and in each case there has been a loud outcry from parts of the fanbase.
Now more generally speaking, what I find interesting about this is the choice of name: Darrington Press. Why not Critical Role Publishing? Wouldn't that give them more automatic sales? I wonder what the reasoning is behind this; maybe they don't want to step on WotC's toes, as Critical Role has a strong relationship with them and starting a self-named publishing company might be viewed as overt competition, rather than the more covert competition of Darrington.
I think so that they can offer things that have nothing to do with Critical Role. They can create new games or supplements for existing games that don't connect to the world established in Critical Role. They can always slap a "from the creators of Critical Role" label on a product if they think that will help, but the name of their publishing company being more neutral is probably just a way to broaden expectations.