> 1. Easier case: how to prevent being de-anonymized by curious individuals and specific corporations (e.g., multiple ISP's colluding together may be able to de-anonymize you, but for example a specific company like Google can't).

GitHub is Tor-friendly, so you can piggyback off GitHub pages with Tor/proxies and get something out of that at no cost. Occasionally, they may automatically determine you to be a bot account, but support is responsive and reinstates it within at most days if you seem human enough. Censorship remains an issue, but shoving the pages manually into archive.org should help build some resilience at least.

Maybe mirroring on BitBucket and GitHub will also work.

> 2. Harder case: ensuring anonymity even from state-level actors.

This is a very, very hard problem. Your best bet would probably be compromising a few poorly-secured websites outside the sphere of influence you're trying to hide from, doing this from a public hotspot in a foreign country and then connecting to them only via Tor. Of course, if Tor is enough of a red flag in and of itself, you'll always have to travel to post, which is just as suspicious.