> * what's the scale of the forums that work fine?
Why, as a user, do you care? As a user, this question is irrelevant to my interests.
> * what if other people want to consume more content than "a few bloggers" produce and recommend?
They physically can't. There's simply more content in existence than a human being has the physical ability to consume. And you'll run into problems with depression, medical issues caused by sitting, and internet addiction long before you run into your physical limits to consuming content.
Quantity isn't the problem, quality is.
> * when you say "does better", what do you mean?
Finds higher-quality content that is more entertaining and/or informative tailored to my needs.
Yes, my needs are different from other users, but the whole value added that ad-based sites claim is that they spy on users to tailor content to their needs. My claim isn't that the content I find is better than anyone else's, it's that my way of finding content does a better job of finding content that fits the users' needs than ad-based sites do.
The problem is, at a fundamental level, ad-motivated spying doesn't even have the goal of meeting users needs--the goal is to meet advertisers' needs, and that only incidentally meets the needs of users sometimes.
> * is the best medicine made by pro bono pharmacists? are the best buildings made by off-duty carpenters? are the best movies made for free? with the best special effects? are the best novels free? the best graphic designs?
Are the best of any of these things supported by ads inside a walled garden platform? You do make a good point: none of these things are typically supported by the business model you're defending.
> would everyone agree with your assessment of what is 'best'?
If you don't agree that "like and subscribe and by the way I've been playing Clash of the Clans lately" is such garbage that it's questionable to call it "content", then we disagree at a fundamental level so there's not much of a discussion to be had. Suffice it to say, I think most people agree with me.