Edited July 3, 2020
at 07:56 AM
If you add the ring camera and echo show to your cart, you should see a "special offers" button to click on. Once you click that you can add a Blink indoor camera and tplink smart plug for $5 each!
You may have to click checkout before seeing the special offers button.
Also, there is a free WiFi smart bulb that gets attached to the bundle as well that is most likely not in stock so your order may get stuck. Just remove the bulb from the order and it should allow you to checkout.
Also, this worked on mobile, but I didn't see the special offers button on a computer.