1. A method for categorizing documents in a distributed database to create categorized documents, the method comprising: initially assuming all documents are non-commercial in nature; calculating, through the use of at least one processor, a transactional score, wherein the calculation of the transactional score comprises determining whether the documents include a field for entering credit card information or a field for a username or password for an online payment system; calculating, through the use of the at least one processor, a commercial score based on the transactional score; filtering out, with the commercial score and through the use of the at least one processor, all documents that are commercial in nature and placing them in a first category; filtering out, through the use of the at least one processor, all documents that are existing advertiser client documents from the documents in the first category and placing them in a second category; and defining all remaining documents in the first category as lead documents and placing all lead documents in a third category.