Reddit is super ban happy today. That's because of the complete trash fire that resulted of their original policy. They literally just had straight child porn on the site for a long time before they finally had to actually bite the bullet and fix the platform.
Reddit didn't have child porn in the open at any time that I'm aware of (I joined in 2008). What it did have were subreddits catering to pedophiles with "barely legal" content, which repeatedly were found to contain child porn distribution rings operating via PMs.