Abstract: A system comprising a server including a memory device having executable instructions stored therein and a processing device, in response to the executable instructions, configured to receive a content request from a destination webpage server, the content request including a Hypertext Transport Protocol (HTTP) header, identify a referrer from a referrer field of the HTTP header, the referrer indicating an originating webpage, determine a frequency the referrer has been identified from prior page requests in a given time period, compare the frequency with a configuration value indicating a max frequency for presentation of one or more content to content requests associated with the referrer, select content to be delivered to the destination webpage server based on the comparison, and modify the content to be delivered based at least on exhausting the max frequency for presentation of one or more content to content requests associated with the referrer.