Upload & Sell: On
It's all laid out in the FAQ's
2) How do I know if my Upload & Sell membership is activated and what are the size/dimension
Your service is active when you see "Upload & Sell: On" on your profile.
In order to make the forum experience enjoyable to all members including those on dial-up,
we allow files up to 550kb in size. There are no restrictions on image dimension, but please
keep files around 800px, so that members using monitors with lower resolution can also
enjoy viewing your photos.