I am that old GC mod and I can confirm there was no CP. All images had to be manually approved by the mod team before they were posted so that there was nothing untoward. We were particuarly stringent on non-anonymised screenshots so we didn't fall foul of Reddit's rules - not least because there were armies waiting to report any slipup. It would have caught any pornographic images as well. All new posters were put through manual approval until they'd been around for a while so you couldn't just show up and create a scene with no history. I never saw any CP in all my time modding r/GC, just a bunch of scabby cocks on one occasion. The rest of the trollposts were just inane shut up terf anime meme bullshit that noone but us ever saw. I think they must have known it would be impossible to plant shit on our sub so they didn't even try.