Thank you for pointing out the mistake. We are a small team of human beings so errors happen. Just like bugs or regressions can happen in software development, there can be typos in blog posts or website pages. We do our best to avoid them but they happen, so we correct them when we are aware of them.
Regarding the content of that blog post and some previous posts, I know that it may be boring to read for free software experts but it is also important to explain the advantage of free software to people who are not aware of if. The goal of Purism has always been to expend its message outside of the core audience of free software enthusiasts and to develop freedom respecting devices for everyone. Which is not an easy task but what we have accomplished so far with mobile and convergent technologies is amazing! And we keep moving forward.