Originally Posted by Apache
What makes you think this is an accident?
As an example, if they made $0.10 per book collecting illegal sales tax on 10,000,000 books that is $1,000,000.00 a day. And before you say they do not sell 1,000,000 books a day to California residents, who is to say California is the only state they are doing this in. This is just an example but, they could be making a lot of money doing this. And the majority of people will never notice.
I am confident they pass the collected sales tax over to the state. Penalties for withholding collected sales tax are severe. On the other hand, the state isn't very motivated to punish or even investigate 'over compliance'.
Also I doubt they handle very much business, otherwise it would become a significant customer service issue and eat into their profits. The majority of people will just buy the books on Amazon B&N, Apple, Google, Kobo because that's more convenient and except for the $9.99 deals that they currently run, it is usually cheaper to do so.