Abstract: Disclosed herein are systems, methods, and software for implementing runtime experiments with user interface configurations. In at least one implementation, an online application service receives access requests associated with various client applications attempting to access the online application service. In response to the access requests, the online application service communicates with an experiment control service to identify an experimental configuration in accordance with which to present a user interface to the online application service. The experiment control service selects the experimental configuration from various experimental configurations. The user interface is then presented in accordance with the experimental configuration identified for each of the client applications.

Abstract: Entitlement cards having an offer term and number of user licenses for a subscription to an online service can be applied to existing subscriber accounts to add or otherwise adjust the number of user licenses associated with the subscription. When an entitlement card is added to an account, the system automatically adjusts the amount of time for each user license so that an entire value of an entitlement subscription is used and a same expiry date is maintained even when adding new user licenses to an existing account. A user interface is provided that enables a customer to change the number of user licenses for a subscription when redeeming an entitlement card to their account and view a new end date for the subscription as a whole resulting from a change in user licenses during a current subscription.