The Obamacare web site gives data to many companies about its visitors; these companies can integrate that data with other personal data to increase their knowledge of the person.

They say that the companies are prohibited from using the data for "business purposes", but I expect they have already found other ways to use the data while pretending it is not "for business purposes".

I wonder if the site requires running nonfree Javascript code.

Sure, the analysis is useful — but government relationship to the public should not be designed in a narrowminded way that considers only the specific project. This web site should never give any data about people to any company.