Originally Posted by Irish Lion
Looks like I was laboring under a misapprehension of how the Amazon/Pottermore linkage works. My understanding was that even though Amazon will link you to Pottermore, you can only purchase the books DRM-free.
If you download the book direct from Pottermore, it's DRM-free. If you link to Amazon, and then download from Amazon, it has DRM. I don't see why the same couldn't done with Kobo, too.