It should be auto released if one party didn't put up the funds after a period of time.
I don't understand why you have such a difficult time understanding unless your just trolling

Explain to me why a seller would have to put anything up besides a small fee?
The seller actually doesn't pay anything he just supplies the same amount as the buyer so that the transaction will get confirmed. After both parties have supplied to the escrow, the seller will get his supplied funds back.