Blurb provides free ISBNs for books made in all their creation tools except BookSmart. Why discriminate against BookSmart users and make it difficult for them to get their books out there for public sale? It would be very easy for Blurb to give BookSmart users the same access to free Blurb ISBNs that the rest of the Blurb bookmaking tools have, rather than force them to be the only Blurb users that have to buy and manage ISBN ownership if they want to sell on Amazon and elsewhere.