Amazon Echo Button Teardown

[GeorgeIoak]

Looking for a 2nd set of eyes if anyone has time. Amazon has these devices called Echo buttons. They're basically a bluetooth button with RGB LEDs. They have an interesting design. To stabilize the top of the device which acts as the button they placed 3 button pads on the PCB in a triangle shape using the common remote control pads with carbon buttons
Each of the 3 buttons are tied together (both halves of the spokes). What's interesting is that 2 of the buttons are connected to a circuit with a few parts, diodes, cap, resistor. The other interesting thing is that they use a bunch of pads that look like they meant to be series resistors but instead the 2 pads have a trace going between them
Here's a link to a few photos and a link to someone's page that did a tear down, https://1drv.ms/f/s!Aq7zmueeHqmsgP81wJIQ3wcgA7L-fQ

As far as I can tell there's only 1 connection into the MCU for the buttons so perhaps the diodes are some fancy ORing circuit on the 3 buttons? I just keep scratching my head as to why they didn't just use 3 pins on the MCU and use software debouncing. With billions of remote controls using this carbon soft pad for buttons with no debouncing why on this product did they go a little crazy?