I was looking for a source of interesting and varied information and knowledge, to supplement or replace Mastodon, Stack Overflow, and/or The Atlantic, and I think I may have found it.
Public companies' SEC filings.
Currently reading Toys R Us' 2006 10-K annual report:
(Via this Naked Capitalism post about that company's awful experience with private equity looting: https://www.nakedcapitalism.com/2017/09/toys-r-us-another-private-equity-casualty.html)
Learning all kinds of interesting things, about toys, kids, finance, etc.