I used LinkedIn to discover insights about various business domains (tax, e-commerce, marketing). I doubt Mastodon would have this sort of content, but happy to be proven wrong if you can provide some examples?

HN is quite useful, but it tends to feature highly technical content most of the time. Which is absolutely fine, just not what I'm always interested in reading about.

I'm not sure what you're referring to when it comes to Twitter's recommendation algorithm. I was able to easily filter out content/creators I dislike.