[Miner49er]

They don't just ban subs randomly for the most part, they've slowly been changing reddit rules to make the site more advertiser friendly. So yeah, most of the below broke reddit rules, but not when they were created, they got banned shortly or immediately after a rules change, AFAIK. I think /r/thefappening was banned without a rule change, and I'm not sure what rule it broke at the time.

/r/nflstreams, /r/gundeals, /r/gunsforsale, /r/shoplifting, /r/thefappening, /r/darknetmarkets, /r/deepfakes

[gilrain]

Figured. Those are all either promoting illegal behavior or existed to spread porn of non-consenting people. I am fine with reddit being hostile to that.

[Miner49er]

/r/gundeals and /r/gunsforsale were promoting illegal behavior?

[Steko]

From what I gather there were regular posts that facilitated illegal gun sales. /r/gundeals was banned and brought back after 90 days when mods and admins/legal got on the same page about what rules were needed and would work.

[Miner49er]

Ah, I didn't realize they brought back /r/gundeals.