I've grabbed over 1,000 of those. One could argue that too much of my life is now spent grabbing pictures from Webshots. However, it brings joy to my twisted little life to accumulate pictures ranging from photos of Yosemite National Park to the paintings of Rembrandt to colorful images of Winnie the Pooh and the Veggie Tales crew. Xara's Webster is a little different. This saves local disk space, obviously, and provides instant upgrades to the clipart library, because they add them to one location on their servers and all users immediately have access.
Many applications use web-based help now, and more and more are moving in that direction.
I'm not exactly sure what Webshots' source of revenue is, since their software is now free. I can only guess the banner ads pay well. With a clip-art library, the application does not even need to be free, necessarily, and the banner ad revenue would only be a bonus on top of registration fees and sales. Webshots is somehow able to generate enough revenue to afford to pay for two professional photos each day, so I'm sure a clip art site funded by a software producer could manager to underwrite one or two professional pieces of clip art per day. Looked like a good package, but I am sure that it would have been much better had the vendor allowed for people to trade room and home designs over the net, and maybe made a new one available every day or every week.