What is the Professional Plan?

The Professional Plan (starts at $250/month) - not only gets the publisher more traffic credits to spend per month (min. of 250 additional credits per journal per month), but also gives them the ability to shape their traffic. For example, instead of promoting all of their articles over the network, they can select to only promote articles published within the last 2 years. As well - they can restrict the recommendations on their sites to only show their content published within the last 2 years. As a result the relative traffic increases to the smaller group of articles can be much higher.