The latter part of Rule 3 is the issue:

If it’s not obvious why your post topic revolves around selfhosting, please include details to make it clear.

There is exactly one sentence in the post which relates to self hosting, buried in the middle of a paragraph, and one which could be plausibly understood in two ways: 1) we (Anonymous) are recruiting the working-class people who maintain the infrastructure that keeps the world running, or 2) we (Anonymous) are seeking people that know how to build self-sufficient infrastructure. Only the latter might be vaguely self-hosting. And in no circumstance would I say the sentence is "obvious".

I won't rules-lawyer the other points, but I repeat the old adage: when you hear hooves, think horses, not zebras. If a post is skirting multiple community rules, and the community is downvoting it into oblivion, then all signs point to a post that shouldn't be here.