Even if you're directing this at the user's blog posts specifically; this is a ridiculously pessimistic, sad way to view things.
I hope you're just having a bad day because if you sincerely have this greedy, cynical mindset day to day(towards blogging, software, offline/real life activities, whatever) I feel sorry for you.
GP's comment might be provocatively phrased, but I don't think it's an invalid point to have:
When I publish something online for free, i.e. without requiring authentication or payment, be it a Reddit comment, a blog post, a Stackoverflow answer or anything else, I do so hoping that it will be useful to somebody somehow, without any illusions about being able to gatekeep some types of current or future consumers.
