Abstract: Techniques described herein include providing personal data of users of a payment service to a data service when such users have granted sharing permissions. Then, a query may be configured to determine which of the users are eligible for a promotion from a third party service. The query may be sent to a data service and a query result may be received from the data service based on the third party service provisioning a temporary viewing permission to the payment service. Eligible promotions may be presented to individual users based on the query results.

Abstract: A user of a social network can open a tab at a business (e.g., a bar or restaurant) and can provide a message to other users of the social network, to which the user is socially coupled, to join the user at the business. The message to the other users can include an account identification that the other users can use applying money to the tab or in purchasing a good or service, for sale by the business, for the user. One or more of the other users can be present at the business to purchase a good or service for the user, and/or one or more of the other users may not be present at the business to purchase a good or service for the user. For example, one or more of the other users can purchase a good or service for the user from a remote location.