My own experience with devices that can be filled up leads me to believe that there will always be an initial increase in buying rate because of the newness and

My own experience with devices that can be filled up leads me to believe that there will always be an initial increase in buying rate because of the newness and emptiness of the device. The rate at which you buy books to read can vary. If it increases, that doesn't mean you're buying books just to fill up a device. You're still buying them to read, just faster. I would imagine people who get a brand new device for reading likely increase their reading time too.