Techniques are described to incrementally change the availability of a feature of a software service to clients over a network based on a configuration setting indicating the proportion of the clients that is eligible to receive the feature. In an implementation, a client rank is generated for a client on the network based on a client identification that identifies the client and a feature identification that identifies the feature. The feature may then be made available to the clients via the network if a comparison of the client rank with the configuration setting indicates that the client is eligible to access the feature.