I did something similar. I had Claude fork an anonymous image board, add features to it, fix bugs in it, optimize it, add the ability to import
(convert) simple HTML to the boards markup language and then I moved most of my blog posts to it. To keep it challenging the board permits many file types.
The cost for my setup is a little bit more as I wanted it to be able to handle some abuse without the need for a CDN but I think most people would just put such a thing behind Cloudflare on their free tier. It's still significantly less expensive than off-roading.
It's not exactly a traditional blog, nor is it a traditional image board. Replies may not get through real time but if they are thought out and do not break US laws or the site guidelines then it is likely they will end up on the site which I think is still a little better than some static blogs which I used to have. It's not for everyone. Well, its probably not for anyone other than me. My emphasis to Claude and Grok was to ensure it does not require JavaScript and makes a best effort to be WCAG compliant and respect peoples motion sensitivity preferences even if I never hire someone to certify it. I don't even know if HN has anyone that benefits from a WCAG compliant site.
Residential Proxies, VPN's and Tor can post but will likely end up in a moderator review queue as in my opinion all image boards should have instead of java-script puzzles or PoW, captchas, crosswalks and traffic lights as well as playing OMG hurry whack-a-mole, fighting raids, leaks, etc... Obvious crawlers get nullified.