Starting with your last point, I actually buy most of my hardcovers from Amazon.ca
And I agree, since I buy the Insider stories, then I have no need for the paperback.
But my concern is based on including these previously-unprinted Hyperspace-exclusive stories in paperbacks. I never had a Hyperspace account. So something that went straight online was never an option for me.
Consider the two recent short story publications: Restraint and End Game. Both came in re-releases of Episode I and Darth Maul: Shadow Hunter. Both were in paperback exclusives, and neither was published in a magazine or online. I already owned the hardcover of Episode I and a paperback copy of Shadow Hunter (for Saboteur). I had to rebuy both. Now, these were cool editions that tied into Episode I in 3D, but still. That's weak.
And consider many of the previous reprints. Sacrifice contained Boba Fett: A Practical Man. That wasn't published in a magazine that I would've bought. That was published online as an eBook years before eBooks were even a viable medium. Nowadays it's a little easier (a lot of people have either ebook readers like Kindles, Nooks, or Kobos, or have apps for their iOS or android device). But back then, the only way to easily get Boba Fett: A Practical Man was to shell out money for the paperback, even if you owned the hardcover.
I think the short story reprints should come in the hardcover though. Spending more money on a product should entitle someone to the bonus content. Or do exactly what Suvudu has done: short stories that were paid-online exclusives before should be free online (and then also reprinted in paperbacks; no matter, I already own the book).
OR: Put the fiction in direct-to-paperback books. There were relevant stories for Shadow Games and Riptide, and Suvudu has tie-in stories for Knight Errant. These are good options too.
-Sparks Nevada, Marshal on Mars
"Who cares what evil lurks in the hearts of men!"
"Unless evil's carrying the Martini tray, darling."
-Frank and Sadie Doyle