I'm really not sure why no one else seems to be interested in doing this. I'm interested to know why.
Actually, can we turn that around? Why are you interested in doing this?
It looks like you're trying to use it as a selling point on Hollow World, but it's still not your lead. On Amazon, I'd only find out about it if I expanded the blurb after reading the first nine lines, or if I read seven paragraphs into your author's note. I'm not sure I'd even be looking at a book listed as paperback only if I cared about ebooks.
Oh, and since you don't have an ebook version posted, isn't it impossible to use Matchbook? Why wouldn't you want Amazon to handle this for you whenever possible?
The best thing about Matchbook, of course, is that Amazon is taking the time to promote and support it. It'll be common knowledge soon, making it easy for buyers to factor it into their decisions. Beyond that, the barriers to using it should be lower, because it's built into Amazon's user experience and it automatically leverages their database to check your purchases. No scanning receipts, no forwarding emails, no PDFs, no asking a big scary author for a favor, no querying you afterward about how to load it onto their Kindles.
Matchbook makes a lot of sense to me, but I'm not sure I'd go so far out of my way to mimic it. What's the expected ROI? How will you assess its success? Are there better uses of your time and resources, like simply posting an ebook version of the book (or even a free pirate edition)?
I'd love to hear your thoughts! As an aspiring spec fic indy, I'll crap my pants with glee if I someday achieve even half your level of success.