In one aspect, a method includes identifying an upcoming content modification opportunity on a channel. The method also includes responsive to identifying the upcoming content modification opportunity on the channel, identifying a group of multiple content-presentation devices tuned to the channel. The method also includes using, at least in part, an amount of content-presentation devices in the identified group as a basis to determine an amount of system resources to request. The method also includes requesting the determined amount of system resources for use in performing actions that facilitate at least a portion of the content-presentation devices in the identified group performing respective content-modification operations.