4 Chan continues to be the best actually "free"/borderline unmoderated forum to this date.

It just comes with the problems that come from allowing it's users to speak whatever they want - anonymously... Hence you usually get everything there, from the most insightful to the most offensive.

You might prefer a highly moderated platform such as HN, but 4Chan has it's own strengths if looked at from a natural position

how they deal with plain spam? if it's unmoderated and anonymous why it isn't floating in see of bot generated spam?

it's not entirely unmoderated. some of the rules are being enforced fairly strictly - for example, NSFW images on SFW boards get reported and erased within minutes. blatant spammers, shills, and schizos get dealt with too. only residential IPs can post, which reduces the volume of shit quite a bit. a dedicated schizo can shit up a thread, a coordinated raid can shit up a whole board, but given the ephemeral nature of 4chan, it's like pissing in an ocean of piss.

rather, it is politically unmoderated. which is, of course, the pearl-clutching anathema.

Politically unmoderated? Try to be leftist and see how long your posts last.

It's pro-Nazi because the moderators can't stand anything else.

Especially when we've already got searx which accomplishes the same thing and is more transparent

What a normie question.