I've thought about it and it's come to my conclusion that this current method is beneficial to everyone.
The old method, when you visit the page, you would have to wait to download EVERY image that's on the page. Now multiply that with 10-20 users per minute, doing the same thing -- this would slam my server's pipe. Your suggestion of displaying 10 pictures at a time, while will be less than the original method would still have some impact on the services.
This way, with the extra window for displaying the images, you don't have to load every image that I saved as a screen capture. Each user get to see one image at a time.
In regards to having the image 7 times as large, the quality of the image would drastically dimish as these are screen captures and not taken on location with a digital camera. The image quality from the feed that I get is already degraded and I've made the images as large size as possible with the quality of the image in mind.
I wouldn't mind purchase higher-quality equipment to do screen captures at higher-resolutions, but that would require me to invest personal funds that I'm not quite necessarily ready to part with at this time.
But, I do try my best to insure that everything done on the site is to increase visitor enjoyment while at the same time, help me with supporting the site.