Some embodiments provide multi-tenant billing systems and methods whereby data network usage fees that are associated with delivering select content of different content providers over a data network are passed to the content provider that originates or is the source for that select content instead of the end users that request and receive the select content. A deep packet inspection server or a billing server may be configured with a list of identifiers to distinguish between the network usage that is related to the delivery of the designated free content from the network usage that is not related to the delivery of the designated free content. The network usage can be distinguished by filtering or processing usage logs that track the network usage using the configured list of identifiers. Such filtering or processing can be done in real-time or in a delayed manner in a standalone or integrated system.