I don't publish on Substack, I publish on my own site: https://simonwillison.net

I use Substack as a free email provider for the email newsletter copy of my blog - which saves me hundreds of dollars a month in email fees.

What internet company isn't run by those types?

"Why publish on Substack, a venture‑backed tech platform whose leadership has chosen a permissive moderation policy?" fixed it for you.