An important part of the ranking process is our survey of over 20,000 industry figures that is carried out during the Fall. In the survey, we ask an open-field first question to identify the respondent’s favorite networks for running CPA and affiliate campaigns. The open-field nature of this first question was designed to avoid any selection-bias caused by prompting or by which networks we included in a pick-list. On a subsequent screen we provided a list of almost 50 networks from which respondents were asked to choose an additional four networks in each of the CPA and affiliate network categories together with an additional open-field for write-in choices. In all, some 400 networks were included in our considerations.
In addition to the survey, we researched and aggregated expert views, traffic data, measures of industry influence and as many other pieces of data as we can gather.
The final result of all these deliberations is the BLUE BOOK Top 20: the biggest and fairest evaluation of which are the best performance marketing networks in the world.