The game could have none any of the character pronouns, or controversial elements, and still sold 700 copies. I didn't even know about them until I came across this thread, and I've been 'following' the game, even played the Beta.
I don't think the internet discourse surrounding this particular element had a measurable impact, particularly when you weigh it against the other prominent factors that relate to game releases. Of course, it may have played a factor for some gamers, but there is nothing to suggest that gaming audiences are politically to the Right to the extent that a high profile Sony title could die at launch. And that's my argument; not that some would have been put off, but rather that it cannot account for sales this low.