You're highlighting Apple's strategy very well, with one omission: the M1 Macbook Air at Wal-Mart was US only. Even next door in Canada with the same retailer, Wal-Mart didn't have that deal.
This is the M1 Macbook Air deal for the rest of the world as well as the US. This is huge, it's the cheapest Mac laptop of all time. Apple Silicon is paying dividends!