For anyone interested in their work being seen by many others, you are being forced into the future--right now. (Explore)
You have to decide whether you want to make money, or not.
If you don't care about making money from your images (at least at this stage of your life) but want them broadly seen, then you have to label your photos as Creative Commons and get on the open source photography bandwagon.
Yahoo!, who owns Flickr, is by far the biggest user of my photos, accounting for thousands of visits a day to my photo stream. It thrills me to think that on a given day my images are being seen by millions of people by (e.g.) being on the front page of a Yahoo! home page.
You're in or out--decide now. Open source is the wave of the future.