Return on investment = ???
After the post-9/11 emergency spying supplemental appropriation, which I think was in the range of $10-20 billion, we now know what the run-rate is, only after a recent law.
Just for perspective, that amount is four times the budget of the State Department, twice the size of the entire Federal Justice budget, and about the same as the entire Department of Homeland Security. Ten times the size of the National Science Foundation ...
The recent DNI has even begged off giving out unclassified parts of NIEs.