Did NSA blackmail Roberts to OK Obamacare?

“But let’s take this possibility: Why did Chief Justice Roberts at the eleventh hour change his decision? He was going to side with the other justices and find that Obamacare was unconstitutional.--- WND

A couple observations:

1. Even if they blackmailed him, he didn't have to pay the blackmail.
2. Of course, blackmail is possible.  Why else would they be doing it?  Spying upon Americans?  Whatever reason could they have for doing this?  Of course they are interested in using this to control people--- what they do and what they say.

That doesn't prove anything, but Roberts didn't distinguish himself regardless of what happened.