FBZ isn't banned. Links that fall under the category of Self Promotion are. Don't make the mistake of using sus links.

They're likely seeing bots or bad actors spamming crap and they're trying to clean it up. In order to do that, realistically, you've got to write a program that goes post by post looking for key words or phrases, like links to Amazon or other known sellers, and the flags them all.

This kind of program, depending on how you write it and how much data you feed into it (ie how far back you ask it to check and how big your word filter is), and how much computing power you have to allocate could take a very long time to run.

Personally, I think the evidence for FBZ is weak. People started making all sorts of wild claims about anti-parasitic drugs and cancer during the COVID years. People posted all sorts of weak and out of context evidence claiming that drugs like albendazole, fenbendazole, ivermectin, etc were cure-alls. I have had enough exposure to cancer research to know that just about everything on this planet at one point or another has been claimed to cause it or cure it. Getting good, high-quality evidence that it actually works for a broad spectrum of people or cancers is a much more difficult task. These drugs aren't terribly dangerous, but they're also not intended to be taken long-term either. The data we have is based on taking them for a week or two to cure a parasitic infection. We don't have long-term safety or efficacy data on any of it because no one takes it that way.

I support free speech and open discussion, but I also understand what the mods are dealing with and it's a real PITA for a site administrator, which is why we're seeing the salt in this post.