How does access, or lack thereof (paper behind paywall), affect the influence a paper/researcher has? With sites like Researchgate.net, Academia.edu, Google Scholar, Arxiv.net, etc., journals are no longer as important, or unique, as they used to be. With open online access, papers can be read by many others, including practitioners and the general public who may apply learnings from the work. What makes a paper influential in 2015?