I don't know anything about the Obamacare website but from what you say that sounds very different since the US purchased something. It just happened to be from a foreign country. That sounds perfectly reasonable and common, assuming their was some kind of competitive selection process.

This is a grant:

> This grant also does not create any commitments on our part, other than using the funding for the purposes that we have outlined in our proposal

What am I missing?

Mutual openness of public procurement to companies of the partner country are a key ingredient of any trade agreement.