Social media is easy, yet users commonly need help because they simply can't manage a login/password... I don't think this DIY approach is simple enough to get traction
I could see a service where you paste in a URL of anything you find interesting, then that service going around and finding an RSS feed or newsletter signup and doing it for them... maybe taking off
I'm working on something similar, rather than finding an RSS feed it simply finds blog posts (or personal site pages) that are similar to your query. Probably a next iteration would be to create RSS feeds from the dataset.
Or, as we call it, a "Follow" button.
Who is "we"?
Whoever "we" is doesn't seem to see the distinction between what is being described here & above and a follow button.
This could be done using RSS and feed:// uri scheme if it was more popular.
https://notes.zachmanson.com/feed-uri-scheme/