One of the reasons that Amazon gated textbooks was because they were sued by textbook manufacturers over counterfeit sales back in January. I don't have any insight into what has come of that litigation, but my assumption is that the recent gating is a response to it. The same thing could certainly happen in the Lego market if TLG took a similar step as the textbook publishers, but they don't have the same incentives to be as aggressive given that their business model is so different than textbook publishers. Those companies have a vested interest in destroying the secondary market for their products because every textbook that is resold is one less sale that the company will realize...that's why they refresh textbooks every few years with new editions. For Lego, the secondary market is fundamentally different...retired sets don't function as substitutes for sets that are currently available so Lego doesn't have the same inherent incentive to destroy the secondary market. And Amazon is, I think, keenly aware that imposing a hard brand gate on Lego would effectively destroy the market given the restrictions that TLG places on who can become an authorized dealer. If they weren't, I don't think they would have been as generous with the grandfathering last year.