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Re:What interests Reddit? A network analysis of 84M comments... by Houshalter on Wednesday February 18, 2015 @02:52PM (#9070570)
The admins released a bunch of anonymize voting data once. And several people have distributed datasets of scraped comments. Sorry I don't have links handy. Check through /r/redditdev
Re:What interests Reddit? A network analysis of 84M comments... by faizshah on Wednesday February 18, 2015 @02:55PM (#9070584)
Thanks for the tip, I found the link you're referring to:

https://github.com/umbrae/reddit-top-2.5-million