the extensions were not free i was trapped there for 21months and at the start was paying dong 1,500,000.00 a month then it went down to 1,000,000.00 , others were paying more ,.and i have friends there and have not heard about the cambodia boarder being open ,i left in october last year and it costed aus$6,000 plus $3,000 for quarantine ,just in case someone wants to know