I think he's saying that the Discovery Bar essentially is advertising. I tend to agree, although I find it inoffensive, and I too have found interesting things there occasionally. I generally find ads that are presented in parallel with desired content (off to the side or whatever) to be tolerable, since I can give each ad the amount of attention it deserves, which is usually none. But ads which are presented sequentially before or during video content are intolerable to me. I will never pay for any service that would force me to watch such ads.