Could just be a consequence of a less ideologically diverse user base to start with.

I’m so upset about (privacy, reddit, corporatism, etc, etc) that I’m prepared to leave my large online social networks for a smaller space on principal is probably a bit of an outlier position to take.

Not that it’s wrong, but it’s probably something we’ll all agree on. Something out there is so fucked up we refuse to be a part of it on principal, even if we don’t fully agree on what that is.