"CAs are basically a protection racket, just add an exception to your browser and if it happens again you'll know something is wrong." - some anon from 8ch tech
Commercial CAs are relatively independent, while free ones (i.e. this https://letsencrypt.org/) would likely be sponsored by government(s) and big corporate rackets.
Just like open access libraries in USSR had mostly propaganda books. They were both free and completely useless.