Sure you can. At least for a while.
The bottom line is the offer was to give them just enough money to service the debt while increasing the debt. Before that point any "loans" went into the Greek people's pocket in some manner. It made sense for them to accept the cash, thinking they would wiggle out of repaying it. But now, why accept another dime, it just is being returned to the "creditors"? Greater fool theory runs out sooner or later, and it just happened here.