Sending advertisements to customers

Advertising is directed to a select list of customers. A request comprising arguments defining a customer interest group is used to perform a blind search of a database. The database comprises public and private information about a customer wherein only the public information is viewable by the search requester. An advertisement is sent on behalf of the requester to the customer address(es) of customer(s) found in the blind search such that private information is not provided to the requester.