By WWI, the cost in today's dollars for a newspaper grew to several million. People can't live off small papers today. They live off Patreon and YouTube. They depend on distribution platforms in a way we didn't before.
If Amazon bans your books, it's effective censorship for people who only read eBooks. Sure you can distribute the epub/mobi DRM free, but few people are going to bother with that (or know what to do with the file).
I've written about this before:
https://fightthefuture.org/article/the-new-era-of-corporate-...