Fascinating and helpful information! It is amazing what you can get online these days, and of course from knowledgeable people.
Question remains, though, are the players getting shafted?
Figures are murky. USTA reported in 2011 Total Revenue of $205M. I really doubt NTC revenue is in there -- why would they report it twice? NTC revenue should be added (as is prize money), giving revenues more like $230 milion, closer to what Wall St. Journal reported in their article. USTA financial statement for 2008-9 is online at:
It lists US Open alone as generating over $200 M. The same statement says USTA owns most of Cincinnatti and some of Indian Wells, which may also be separately reported. So without more information, I don't see that we have a fair idea of USTA revenues.
On the player payout side, USTA reports "event prize money/other." I would take the published prizes list, as the articles originally cited did ($7.5 M), rather than USTA's unclear "prizes/other" figure, which is (surprise!?) much higher.
Maybe I am favoring the players, as clear underdogs in any contest against the owners, but so far my best guess is, player take = about 5%, or even lower.