They didn't but no one ever asked for Harry Potter, either. Did anyone ask for Sandman, The Walking Dead, Saga or Bitch Planet? As far as I'm aware, Kirkman even had to trick Image into publishing The Walking Dead.
I started reading Mockingbird via Marvel Unlimited and started purchasing floppies after reading Twitter posts hoping it wouldn't get cancelled. It got cancelled anyway. Honestly, seems pointless to buy the floppies in order to "support" books and keep them "alive" because it doesn't seem the direct market can support them anyway (the Hastings bankruptcy was probably a huge blow). Even Ms. Marvel is down to sub-20K in floppies while being #2 on Amazon's Graphic Novel Bestseller list.