This is why I have a Boox Android eInk tablet, although I only use it with burner accounts. They run Ancient versions of Android.
I've loaded it up with the epubs I have in my Calibre library (which ironically contains mostly books I've bought from Amazon before they made stripping DRM unreasonably hard).
Now I won't buy anything from Amazon because I can't strip the DRM, and hence can't read the books on my e-reader of choice.
Their loss, not mine.
I run Storyteller app on it and have my ebooks & audiobooks synced up perfectly like whispersync but better.
I’m paying for BookFusion, to have synced cross-platform reading. It’s expensive, but seems to be one of the few cross-platform synced readers that supports the EPUB Media Overlays from Storyteller.
Have you experienced ghosting with your Boox tablet? I’d like to get one, but I know that ghosting would bother me.
Once you get all the e-ink settings dialed in to make black text more readable on the color e-ink screen, it’s pretty damned good. I never notice ghosting. It’s not very easy to get the settings dialed in though. If you are purely reading on it get a black and white screen if it’s in stock so you aren’t fiddling with it to get text to really be boldly black instead of grey.
Pirated books have no DRM, usually come in an open .epub format, which can be converted to whatever your reader requires, and you end up actually owning them, even if amazon decides to abandon the kindle ecosystem.