No, they're not.

An ereader is a piece of hardware that has a distinct purpose that cannot be matched by other hardware (high quality, high contrast, low power draw static content). Some of them do run Android, and that's a huge value add. But the actual hardware is the reason it exists.

This is just a dogshit Android phone. There is no unique hardware niche it's filling. It's an extremely obvious scam that is very obviously massively downgraded in all of value, utility, and performance by being forced onto separate hardware.