Indeed. Could call it something like the RedditCrawl corpus.

don’t even need reddit with an llm, I did some back of the napkin token math and you can fake a year of activity for a couple thousand dollars (varies by number of users and comment length of course) - hell, you can even make it look active in real-time and respond to real users - as long as you give it some guidance about commenting style (as in not the default gpt 8th grade essay style) it’s very hard to tell