The site hardly uses much bandwidth at all, under a gig/month. There are 718 users as of now, I'm not sure how many are actually still active in their usage as I don't maintain the site anymore. The last users signed up yesterday, and there were three.
The script is written in PHP, and it was written by me a number of years ago. You get everything, site, graphics, etc.
As for revenue, it generates about $300/year via Google AdWords. You can email me directly at jheathco(@at@)gmail.com