I think you hit the jackpot here. Taking it further: the value of facts° presented henceforth by the WaPo should be traced back to explicit gains.

Not gains for the Post itself though, but for its owner, for example in regulatory capture.

Those can be computed pretty precisely or estimated. How is this income generation not then inputted to the owner as income?

It is said that the USSR failed because of incorrect accounting. Let's not let the Land of the Free fail in the same way!