Maybe a more accurate term for what the blogger values--instead of "freedom of speech"--would be "artistic freedom" or "editorial independence". The blogger values the ability to write whatever he wants without bowing down to an advertiser's opinions. Every post is a "director's cut" edition (to throw in movie metaphors), rather than a bland studio-appeasing release.

At the same time, the fundamental concept in "freedom of speech", "artistic freedom", and "editorial independence" seems to be the same: the ability to express what you want to express without pressure from an external authority. Of course, coercion from a government creates much greater pressure than insistence from a boss or an advertiser.