Earlier quoted context omitted.
Historically, company town companies also paid in their own currency that was only spendable in the company stores. Amazon still appears to be paying in standard dollars.
isn't this mainly because paying in anything other then the national currency is illegal in most western nations? For tax purposes, even things like free lunch are considered paymeny aswell.
Free meals are allowed under certain guidelines, which seem to be written in a way that generally lets companies like Google skate right up to the edge and not go over it (AFAIK). Things like loyalty points and rebates on business expenses are similarly ignored.