Re:Now Is the Perfect Time for an RSS Renaissance
by Notre1 on Monday April 23, 2018 @06:12PM
(#16907934)
Newsblur kind-of has this. You can "Share to your Blurblog," but I don't see a way to have multiple Blurblogs.
You can also tag stories and each tag can have a RSS feed that others to subscribe to, but I don't think there is a web page to send people to for your taggged stories.
Maybe someone knows a service that lets you mark posts from your feed to be shared as a public collection?