Interesting, Commander-in-Thief has stated that Paybase is an entirely separate company from GAW:
http://i.imgur.com/IeLodUB.pngLike I said before - this could be the catch in Garza's statement that a 3rd party would handle escrow.
Paybase issues the buyback, GAW holds the coins. There's your third party.
"A storm is coming" in that case.