NOF: Saints in position to get under the cap with ease and create another $30+ million in cap space to add new players

They are using it, by maintaining space they have more options than we do when it comes to roster management. Creating and spending every cap dollar you can gets rid of those options.

Options have value, I don't know why it's such a controversial view.

Lol. They are using it by continuing to have a bunch of cap space just in case they may want to cut a player that they gave a big contract to at some point? That's not using cap space, that's increasing your profits.