Pretty sure they're getting the 80Kb/s over LoRa. I've used some Pycom devices [0] to try the protocol out and for mesh [1] and it's rather forgiving. Given the number Ring devices people seem to have these days I'm sure Amazon is going to have some relatively large mesh networks at their disposal.
The fastest LoRaWAN data rate specified in the US is Data Rate 13 LoRa: SF7 / 500 kHz: 21900kbit/s.
Even dropping outside of the highly restrictive LoRaWAN specification and going with the fastest physical parameters available for LoRa on the 900Mhz bands (on-time restrictions aside), BW500 (500kHz bandwidth), Spreading Factor 6, Coding Rate 4:5, you end up with 35700 baud.
You can drop these modems into 2FSK mode and increase speed, but at that point the range isn't particularly appealing.
Regardless, the point stands: not a mesh network WAP internet redux, an IoT tool.
Even dropping outside of the highly restrictive LoRaWAN specification and going with the fastest physical parameters available for LoRa on the 900Mhz bands (on-time restrictions aside), BW500 (500kHz bandwidth), Spreading Factor 6, Coding Rate 4:5, you end up with 35700 baud.
You can drop these modems into 2FSK mode and increase speed, but at that point the range isn't particularly appealing.
Regardless, the point stands: not a mesh network WAP internet redux, an IoT tool.