One or more computing devices, systems, and/or methods for determining expected revenue thresholds for presentation of content items via client devices are provided. During a first period of time, whether to present a first content item via a first client device may be determined based upon a comparison of a first expected revenue associated with the first content item with a first expected revenue threshold. A first revenue value associated with presentation of content items via client devices within the first period of time may be determined. The first expected revenue threshold may be modified to generate a second expected revenue threshold based upon the first revenue value and a target revenue value. Whether to present a second content item via a second client device may be determined based upon a comparison of a second expected revenue associated with the second content item with the second expected revenue threshold.