Have you ever used a paid CMS ? Do you think that with WordPress around, a paid CMS can really make a market for itself ?
You won't believe, there are lots of them available. I have no idea how they are finding a market. Their main sales pitch is not unsafe like WordPress. Most of them offer managed hosting too. Some of them do well financially.
WordPress is not safe is a very common argument these days. And those CMS people are really making use of it.