The email I got specifically said free book from an exclusive list ... there were ten items on the list ... from a variety of categories and at least some choices reflected what I have bought from Kobo (or "saved for later"). It also explicitly stated this was as a token of delays in responding to customer care queries (mine have always been through email) so maybe its not a mass thing. Plus, the choice of books may be regionally targeted.
It's a nice gesture and unexpected. Not a discount, free. Really, that's fine in my "books".
