Does the eigenfactor ranking depend on number of articles in a journal?
Wikipedia’s article on the eigenfactor.org ranking of journals answers your question:


  The Eigenfactor score is intended to measure the importance of a journal to the scientific community, by considering the origin of the incoming citations, and is thought to reflect how frequently an average researcher would access content from that journal. However, the Eigenfactor score is influenced by the size of the journal, so that the score doubles when the journal doubles in size (measured as published articles per year).


To give a simple example: the Journal of Physical Chemistry B is the highest-ranked journal in physical chemistry by this criterion… in good part because it carries the largest number of articles. It is a good journal, but under all other metrics it is not at the very top of its field.