I saw income growth of 17.6% in 2014 at PhotoDune. I did submit some files, but stopped after some mass rejections (for which you never have a reason if you don't want individual e-mails), so most of that growth is from the site doing more business, not me adding images.
However, a whole year at PhotoDune is a bad month at SS

They are beating CanStock (almost double for 2014 as CanStock sinks over prior year income).
Clearly their bread and butter is elsewhere and stock photos are an afterthought. In the year in review text, the section titled Photos had text that was all about video...