Interesting concept for sure. Is there a revenue model to attract top influencers? Maybe just links to a collection of Patreon-likes?
A good first step might be making a personal site generator. Put in links to your twitter/youtub/substack/medium/whatever accounts, and then you get a nice looking site with all your content in one place. Maybe throw in a subscribe button so people can get email digests of all your content.
and then, almost as a side effect, anyone who uses the site generator also is publishing it all as an atom feed.
In practice, this would probably start out with plugins for only sites that make data public. Not perfect, but still useful.
You could have the aggregate behind a paywall, you could have donations or ads as well.