To add to this, Amazon recently got rid of DRM-free stuff from Comixology. Then as part of Kindle-unlimited, to fight Kindle-unlimited piracy, they rolled out

To add to this, Amazon recently got rid of DRM-free stuff from Comixology. Then as part of Kindle-unlimited, to fight Kindle-unlimited piracy, they rolled out a new drm system everywhere which took out DRM removal on purchased books in the crossfire. Along with Amazon music changes preventing previewing songs before purchase I have no idea what's going on there. I guess streaming allows them to skim more from publishers/authors hence why they're pushing it so hard, readers/listeners be damned.