Comment by jks
One such tarpit (Nepenthes) was just recently mentioned on Hacker News: https://news.ycombinator.com/item?id=42725147
Their site is down at the moment, but luckily they haven't stopped Wayback Machine from crawling it: https://web.archive.org/web/20250117030633/https://zadzmo.or...
Quixotic[0] (my content obfuscator) includes a tarpit component, but for something like this, I think the main quixotic tool would be better - you run it against your content once, and it generates a pre-obfuscated version of it. It takes a lot less of your resources to serve than dynamically generating the tarpit links and content.
0 - https://marcusb.org/hacks/quixotic.html