It almost sounds like you're described freedom of speech as a right to be heard. That's a distinction of positive/negative freedoms as mentioned previously in this thread. You can host a blog and your speech won't be restricted (negative freedom), but if no one is viewing it, that's because no one cares to hear what you have to say. You don't have the right to be heard (positive freedom) because that would require people being forced to hear you.

If the problem is that you can't build an audience it's not because your freedom of speech is being restricted, it's because no one wants to listen to you.

Or it's because the town square is gone and you have the free speech corner somewhere off into the woods.