"internet chum" is a good one, it echoes "slop bowl".

"Chumbox" has been a descriptive term since 2015:

"A Complete Taxonomy of Internet Chum" (4 June 2015)

<https://www.theawl.com/2015/06/a-complete-taxonomy-of-intern...>

<https://en.wikipedia.org/wiki/Chumbox>