The comparison to Facebook is complete BS.
Even though (as somebody already pointed out) the $634m number doesn't represent just Healthcare.gov, the comparison to Facebook is completely fallacious. Facebook has money coming in other than just their investments; the investment money that is referenced in the Crunchbase page is in addition to any other income that they had. In other words, Facebook spent way more than $634m in that period of time.
Lazy journalism at its best.