He seems quite serious. He mentions he has 12 stacks of 4 each of the Rpi devices, and another 20 around the house.
At the Microcenter near me, they kept stacks of them in a cabinet near the cash registers, and would offer them up at a discount when checking out.
That's a lot of devices. I've got six of the Model 4 Rpi and whilst they're fun to play with, they're not ideal in terms of their hardware and it's a pain trying to find a decent USB drive to boot them from to get decent performance (they'd be so much better with an M2 interface). The only one that I use regularly is one that I've got LibreElec installed on and running as a Kodi box.