ຮູບ​ແບບ​ການ​ຊຳລະ​ເງິນ​​ໂຄ​ສະ​ນາ​ອອນ​ໄລ​ນ​໌​ທີ່​ການ​ຊຳລະເງິນ​ຂື້ນຢູ່ກັບຍອດຂາຍ​ທີ່​ກຳນົດ

online advertising payment model in which payment is based solely on qualifying sales.