About Honey, they didn't find out that Honey was scamming viewers until everyone else did.
What they found out earlier, at the same time as many other youtubers, was that Honey was "scamming" the youtubers themselves by replacing the youtubers reference codes.
At the time they thought the viewers still got discounts, so they didn't announce anything about it since it would seem like they asked the viewers not to take the discounts so that LTT could make more money.
Here is the post from Billet Labs themselves where they verify that they only asked for the cooler back after the video had been released: https://www.reddit.com/r/LinusTechTips/comments/18d6m3u/deleted_by_user/kcfmcnz/
Now, i'm not saying that LTT didn't do Billet Lbs dirty in regards to this whole situation.
They did not test the cooler correctly, and Linus was less than resonable in regards to retesting and such (something he has adressed himself here: https://linustechtips.com/topic/1526180-gamers-nexus-alleges-lmg-has-insufficient-ethics-and-integrity/page/16/#comment-16078641 ).
But people keep hanging up that they sold when they were supposed to send it back, when there was no such agreement beforehand.