The contract the article is referring to JWCC which was a multi award contract. All of the vendors will essentially compete for the workloads under that contract throughout the entire contract.
It was created to replace JEDI which was single award and got so bogged down in legal challenges they gave up and replaced it with JWCC.
https://www.levernews.com/amazon-gets-huge-contract-despite-bidens-union-pledge/
FYI
AWS and Amazon are pretty separate as far as how they treat their employees.
AWS likely got the contract because not many cloud service providers are FedRAMP certified.
The contract the article is referring to JWCC which was a multi award contract. All of the vendors will essentially compete for the workloads under that contract throughout the entire contract.
It was created to replace JEDI which was single award and got so bogged down in legal challenges they gave up and replaced it with JWCC.
https://en.m.wikipedia.org/wiki/Joint_Enterprise_Defense_Infrastructure
AWS also has or had the only top secret classification cloud.