The collective bargaining agreement, as it currently stands, states that rookies who were drafted get a divided portion of the salary of any other drafted rookie that's cut.
So, that may have saved Tony Pike, if nothing else. As well, it might cement David Gettis over a vet like Charly Martin.
Meanwhile, a veteran's contract, like Aaron Francisco's, would be guaranteed if he's there week one, costing a cut of (for instance) Jordan Pugh double anything that could be saved - once for the disbursement of his salary, and twice for the inability to cut Francisco after week one to save anything.
They'll probably still have to choose between RJ Stanford and Robert McClain, unless they do something crazy like put CJ Wilson on IR for a concussion (and Wilson is far and away better a corner, and I'd argue a better cover man than Captain Munnerlyn). The 85% rule may keep either or both ahead of veteran Brian Witherspoon, a solid cover man and return man (but not so fantastic at either that he has beaten out other vested players).
They shouldn't have a problem keeping most of the rookie draft picks anyway - only Armanti Edwards, Pike, Gettis, and the above pair of corners aren't second string, and the first two are safe for now. Gettis has earned the right to stay, even if he doesn't dress.
But, when it comes down to whether he stays or a Kenny Moore, a guy he's outplayed, with Moore earning more and 85% of Gettis' salary going to someone else's pockets? It looks clear what the team will choose.