At a certain point it becomes more labour intensive and expensive to rig someone else’s OS to work across the hardware you’re developing than just building your own. The security systems, the fire sticks, the smart speakers, the WiFi nodes, all need heavily customised OS to work together.
The tablets are loss leaders anyway, a way to sell you Amazon products like kindle, prime video, Amazon music etc. if the OS is useable, and the device remains cheap, people will still buy it.
Amazon make more devices than just tablets.
At a certain point it becomes more labour intensive and expensive to rig someone else’s OS to work across the hardware you’re developing than just building your own. The security systems, the fire sticks, the smart speakers, the WiFi nodes, all need heavily customised OS to work together.
The tablets are loss leaders anyway, a way to sell you Amazon products like kindle, prime video, Amazon music etc. if the OS is useable, and the device remains cheap, people will still buy it.