A method for an internet-accessible content provider computer server that, in response to receiving request information from a referred user device for access to specific digital content subject to a fee, the server: (a) selects a particular payment system based on referrer information included in request information transmitted, (b) transmits to the selected payment system information indicative of the requested specific digital content and a request for approval of the user device for the corresponding fee for the digital content, (c) facilitating communication between the selected payment system and the user device, (d) based on receiving from the selected payment system an approval signal, transmitting the requested specific digital content to the user device.