The great thing about advertising is it funds you no matter if you are famous or not. Bad thing is you have to live under their corporate censorship and all the baggage that goes with using third party sellers (privacy and inefficiency).
To use some of the examples in the article, not everyone can rely on national license fees (BBC), corporate sponsorship (NPR), consistently making a loss (The Guardian), search engines (Mozilla), having a legacy business (CNN) etc.