Upload & Sell: Off
To all the PM Members, before becoming part of the PM team, I have always posted my work on sites like Naturescape and BPN. I have learned a lot with people's honest comments and critiques and often applied those when I am out in the field.
Don't be shy, say what you feel about the images that everyone posted on here. That is how we learn, that is how we improve, that is the purpose of the forum. Comments like "nice work" does not help improve my skills. I like the hear the reasons why you like/dislike a shot from the point of composition or technical aspect of an image.