It used to be a hard rule that would trigger a shadowban, now it's just "reddiquette".
It's strange, I'm seeing a lot of very low tech spam on reddit now. They (the spammer) are not even trying to hide it and reddit doesn't seem to care.
Like it's not hard to script out "check if user submitted a bazillion posts to the same youtube channel" and flag ... at least a good chunk of those.
Reddit doesn't even seem to bother now.
I'm even seeing wholesale just offensive image spam go on for ages like the old days of internet forums, reddit doesn't seem to bother with them...
If the account is new enough and links are spammed within a short amount of time, they are getting auto banned/flagged.
Accounts that are a bit older can get away with it. Sometimes those posts get removed automatically, but that's pretty unlikely. At our sub, we do flag every post that contains a link automatically. In 80% of the cases, this is spam and we delete it.
We have had spammers that kept coming back with new accounts. We have reported it numerous times to Reddit, but we highly doubt that any action has been taken. Especially accounts that try to promote youtube videos are hard to block.
It's generally up to the mods to take action. I do not believe that the 10% rule is enforced in any way.
Bans actually seemed to be really consistent from those reports.
That got shutdown and now the FAQ says use their typical contact admin / black hole that doesn't do that thing...
I'm thinking more large scale across subreddits (including a lot of subs that have nothing to do with the content). Most of these accounts have almost zero recent comments and etc.