1. A method for providing data services via one or more networked computing devices, the method comprising: registering a plurality of end user entities to receive data services managed by a service platform, thereby establishing a plurality of registered end user entities; restricting notification data service delivery to at least a particular one of the plurality of registered end user entities to being both a notification data service associated with a digital signature signed by a secret stored in at least one computer medium maintaining one or more secrets associated with one or more of the plurality of registered end user entities, wherein the secret is associated with at least the particular one of the plurality of registered end user entities, and a notification data service associated with an invoice for a subscription associated with a token requirement pending at least partial fulfillment by an application of at least one credit from a payment towards the invoice, wherein the subscription is associated with a child entity of at least the particular one of the plurality of registered end user entities; after it is determined that the associated token requirement has at least been partially fulfilled by the application of the at least one credit from the payment towards the invoice, storing, in at least one computer medium maintaining one or more invoices associated with one or more pending data services having restricted delivery to one or more registered end user entities, the payment state of the invoice in a data structure maintaining at least the payment state of the invoice; using the secret to digitally sign information to be included in the notification data service, thereby establishing the digital signature; and after it is determined that a transformation in the payment state of the invoice has occurred, transmitting, via the one or more networked computing devices, the notification data service associated with the invoice to at least the particular one of the plurality of registered end user entities, wherein the notification data service includes the digital signature and the payment state of the invoice.