What does not saying the brand name do? It doesn't prevent these cubes from being made or sold. It doesn't stop people from getting information about the KO cubes, they take 30 seconds to find on Google. This practice isn't even mentioned in the forum's "knockoff policy".
I can understand not linking to a site where they sell them, and other ways of trying to prevent them from being sold, but not saying the brand does nothing, especially when everyone already knows what brand we are talking about.
From rule #14
Rule #14 wrote:
Do not advertise sites, sales or auctions for copies of puzzles that are "protected by their rightful owners"...
Naming the manufacturer isn't much different than providing a link, and is advertising. It is not explicitly stated in the short form of the rule but that rule has a link to the Knockoff Policy
thread (sticky in General Puzzle Topics) wherein you will find this
where I make the point directly.
So I think if you actually read the policy, this should be clear.
Our policy is not designed to keep people from buying or finding these puzzles as that is not our place nor a practical goal. It is designed to respect the original designer. Even if the gesture is completely futile from the point of view of someone knowing who makes them and how to get them, it is a the respect that gesture conveys that is important.
Please do take the time to read my post on the matter of respect