We are both wrong. The article you posted here says the "opt out date" is August 4th.

"Aug. 16: All teams must cut their rosters down to 80 players, the day before padded practices begin. With Wick opting out, the Saints currently have 89 players under contract, so some of them won’t have much of a shot at making an impression before things heat up on the practice field. We’ve highlighted ten names to watch for this first wave of roster cuts."

The August 30th date was obviously moved up from what I read earlier. That said, as the article also states, there are players that still have no shot even prior to camp starting.