As Ken said, MyAviation.net is part of Airliners.net. They don't really have any screening guidelines (within reason), so you see a lot of a.net rejects get uploaded there. A.net's screening procedures (quality, consistancy) are a regular topic on their forums. I have one shot there, I've given up trying to upload further. I now upload exclusively to JetPhotos.net JP.net has high standards, but they seem to be more inclined to try to accept (rather than reject) photos. I have a friend who just became a jp.net screener, and have learned a lot about the "behind the scenes" process involved