I think when you're dealing w/ sites (MFL) and your offer is sitting there..it's like playing Russian Roulette. Seems kind of funy, but I have no problem taking responsibility of my own player if they get hurt or do a crime in the offseason. Leaving your offer out there, if something was to occur then they could run and approve it. This is limited, but you never know. For some reason I view it differently once I've acquired a player opposed to when it's sitting out there.
Example:
Ricky Williams, say he is banned and offer is on table for him the owner could quickly approve the deal knowing he's shipping a bum.
Other examples are player who might retire, might get cut and so forth.
I think most people know if they want to do it or not. Hey, let's face it, if the situation changes then the perceived value would alter after too. So, sometimes it's good to jump right away...of course, there is the other side of it too.