Comment by s1mplicissimus

Interesting point. Yes, if you pick too narrow a set of feeds, they might not even prompt you to engage with other sources, leading to our good old filter bubble effect. I'd still posit the risk of that happening is way higher when you only have a centralized platform like, say, twitter, controlling the push-factor based on payment. With RSS, I can still adjust my feed exactly to my preferences once I notice a bias or degradation in quality of certain feeds. This cannot be done if my feed is controlled by a machine optimized for maximizing engagement/advertisement $.