Pertlink’s explainer introduces Token Cost Per Booking (TCPB) and Token Cost Per Guest (TCPG) as budget metrics, warning that AI costs accrue from the first search query, not just active guest interactions.Pertlink’s explainer introduces Token Cost Per Booking (TCPB) and Token Cost Per Guest (TCPG) as budget metrics, warning that AI costs accrue from the first search query, not just active guest interactions.