And 10 billion over 10 years is what? Maybe 3 to 5% of Amazon's yearly revenue? You really want to be at the epicenter of the shitstorm that will happen if the project goes over budget and you still haven't delivered anything anyone in the DoD actually uses? (Maybe I shouldn't have said "if the project goes over" but "when"?) Especially being a big tech firm nowadays?
And you're gonna step into all that unnecessary drama for access to a 10 year / 10 billion project?
I don't think so. Not for a billion a year in revenue when you're already sitting at over 230 billion a year in revenue. (Or even just the over 30 billion a year that AWS alone is sitting at.)
Admit it man, politics being what they are these days, particularly for big tech firms, it's just not worth it.