I use Micro Stock agencies to help offset the cost of the equipment I use and expenses for maintaining my sites. I submit both Royalty Free (RF) and Editorial. Pay isn't that much, and for me at this time it is more the thrill of seeing my images in use. I hope to share my images in use here. Also, feel free to use my links to these sites so I may receive credit for any referrals.
RF - may be used for commercial uses, require model releases for images with recognizable people within the photograph and may not have any copyrighted material within the photograph. So for these, I do need to go in and remove all of the Nike Logo's .
Editorial - may not be used for commercial uses and the photo must be used as captured with no manipulation. Model releases are not required.