I have also been sorting out to use Booking.com as an agent. It has taken me about 3 weeks to get a straight answer out of them about their service. In case anyone else needs this information They ask for 1 free night for every 100 they sell for you this is for their area reps when they come to your area but you don't have to take them. You only have to give 14 days to terminate the contract and there is no minimum contract. Hope this helps.