the reason for that was Dave Canterbury was plugging the crap out of his YT channel and website/store/school, while refusing to pay the advertising membership fees associated with, and in violation of their policies. And then he argued with EVERYONE about every single thing. And then there was that whole "why you got thrown off Dual Survival" thing....etc, etc.........
Not only that he was banned once....he made several accounts of varying names [like...to the tune of 8-10] but the admins kept catching him, banning his multiple accounts because he couldn't leave well enough alone.
and in addition to what was already said, the forum itself comes under scrutiny for "trademarking" the word "BushCraft" - which, BTW, caused another forum of similar name [and respectable reputation] to suffer a cease and desist order and forced to change their name. At least, that's how I understood the whole smoke and pony show.....
You cannot [or at least as I understand it, "not supposed to be able to"] trademark a 'common use' word or phrase. It would be like me trying to trademark the ancient word "Triquetra" - or in it's current Christian name, "Trinity Knot." Yet, that forum was able to TM the word BushCraft, after having been coined may years ago by someone else [I think Mors Kochanski, not entirely sure though].
Anyway...thought I'd help shed some light on the subject.