Naive question, from me: Why isnt there a "streaming hub"

Where anyone can pub-sub model streaming through "allstreams.com" and users just publish to it, and subscribe from it based on the content they want.

Subs pay some amountto subscribe to topics of interest and pubs pay premium to be "featured in their category"

Imagine "reddit for streaming"

and each /s/substream can have uses subscribe and comment and thread-topic beneath the stream....

with meta, mega, mash streams available as an option...

Build your own stream channel watching library....

#tag them so you can have #gaming streams lumped.

#nfl, #nhl or #Raiders for all things Raiders, as an example...

#news or #conservativenews

etc... you get the idea...