On principle I resent the money grab of it. Many books have online features that add to or clarify the books. When I buy the book, I think I should have access to the online material without added charge. IMHO
There is so much support on the web, including shopping lists if you search for them. I've heard that the SB publishers are sending legal notices to sites that use their proprietary vocabulary, but not sure how that might impact message boards like this one.