PaaS ran on AWS anyway, so it wouldn't be Amazon (I would guess? Unless they think they can charge more/upsell by departments procuring directly from them). Per

PaaS ran on AWS anyway, so it wouldn't be Amazon (I would guess? Unless they think they can charge more/upsell by departments procuring directly from them). Perhaps Google or MS were upset that by PaaS running atop AWS, AWS became the de facto 'official' cloud service for government?