So, for twitter specifically, it isn't only about "stars" in that person's situation (probably), it could also be about following interesting orgs/etc (non-people).

And the "interesting orgs/etc" category won't come to the federated socweb until they have link click tracking tools that come preconfigured to support them (aka, never). See also: https://identi.ca/eff and https://identi.ca/creativecommons and <insert any other dead attempt at fed socweb from an org here>