I've never been a fan of social media hubs or other centralized approaches. Even what you call an attempt to "gather all nixers member blog feeds" leaves me cold.

In my opinion, the best place to aggregate rss feeds is on my own local machine. For many years now I've been using Adam Sampson's "rawdog" aggregator to build a set of river-of-news style webpages for various categories and serve them up via localhost. (Lately I've been looking at sfeed as a C-based alternative to rawdog's Python, but it's an idle interest and I haven't been motivated to actually implement it yet. What I have works well enough.)

For discovering interesting new stuff, it suffices if the blogs I read include an old-fashioned blogroll. It isn't necessary for them to repeat or summarize content from the other blogs they recommend. I.e., I'm building my own river of news and don't need you to do it for me on your site. Just give me your content. *

Other leads come as a result of websearches via DuckDuckGo. If a search takes me to a site that looks interesting and I see it has a feed, into the rawdog config it goes.

Years ago I would occasionally use StumbleUpon to find new stuff. But that was a long time ago and I don't know if it even still exists.

* Here's an example of the kind of thing that often results when someone decides to "curate" the news for us: https://devurls.com. Very pretty, but mostly useless. Only one or two sites listed that I care about, and a lot of relatively dormant feeds.