Culling and Weeding out old and low rated images is a good idea. We all want to show the best we can show and those images that do not meet the standards we wish to show, could be stowed into another area...like maybe each year a new start... I regularly cull my images and have deleted those that needed to be removed...especially in the beginning when there were only a few ratings on them...thats the time to cull. You can always redo the image and return it improved as a new image... When I go to see portfolios, the ones with heaps of images get me totally lost...I am trying to keep my portfolio to around 100...and even that gets too cumbersome at times. Others sites restrict to 100 kbs..thats another way of keeping members to a certain controllable limit, or charge more for excess..like excess baggage. Culling is what artists should be doing as their skills and works are improving...to show their current work, and what is happening today.