I think hardware was a loss-leader anyway. They were generously giving them out for free. Games are probably the biggest loss for them as a majority of that money was handed off to publishers.
Not a lot, they were giving away Stadia Premiere kits (a controller and a Chromecast Ultra) a lot (I got 2 free ones, IIRC one from YouTube Premium and the other i don't recall), and all were manufactured in 2019. Which means they drastically overestimate how many people would buy their hardware.