Methods and apparatus for identification and insertion of content targeted to a particular audience within a content-based network, such as a cable television or satellite network. In one embodiment of the invention, audience qualities are identified and distributed to an advertisement decision maker, which uses the information to fulfill advertisement placement opportunities. Qualifiers about an existing or projected audience are classified utilizing an algorithm for qualifier weight and variance in order to determine the proximity any given qualifier may be to a target audience for an advertisement. Subscriber privacy and anonymity is also optionally maintained via e.g., hashing or encrypting data relating to the CPE and/or subscriber, thus ensuring that audience data is not traceable to a specific user account. Business methods are also disclosed.