The US branch of CloneFiles is still in the process of being set up not, but that's not because it was a spur of the moment announcement. You see, this program has rather unusual requirements as to where the paper books can be bought. This offer isn't good for AR Books bought via Amazon, Barnes & Noble, or any of the major chains.
In order to get a free ebook via the CloneFiles program, you have to buy it from a participating indie bookstore. While that does tend to limit the number of readers that can participate, it also serves a dual purpose of supporting indie bookstores. From the way the publisher describes the program I think they feel the latter is just as important as the former.
Right now there are only 7 participating bookstores in the UK with 4 more described as having expressed an interest. For more details, contact Angry Robot Books at: