btw, I don't understand where you're going with this one.
The reason for PTBNLs are usually either:
- that the two teams have decided on the player but for various reasons (he's on the DL, or he's not eligible to be traded yet) can't announce the identity at that time
- or that they've yet to decide on which player(s) they want
but, even in that second case, there's usually a small pre-agreed upon group of players where the trade booty will come from. The delay just gives the team more time to evaluate which one(s) they want. It's not like after the 60 days is up a GM would be able to take his recent fortunes into consideration and suddenly choose from a wide and varying horde of the other team's roster. And the same goes for the PTBNLs you'd be giving up.
Either that or there's something I'm not getting here.