The original healthcare.gov allowed for as they call it "window shopping", but a decree from the White House less than 2 months before launch demanded they change it to require a signup.
edit: fixed time period
edit: fixed time period
From one of the comments, below
So the official healthcare.gov is by design then.
November 8, 2013
Eighteen percent of uninsured Americans have attempted to visit a healthcare exchange website. The percentage is slightly higher, 22%, among uninsured Americans who plan to get insurance through the exchanges.
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== Working like a charm.