As I've mentioned before the web allows business to operate in a new way. Instead of being tied to a geographic location it's now possible to address a much wider audience.
What this in turn allows is the slicing and dicing of that audience into vertical channels. The huge possibilities for social networking also come into play. The end result is things like this Christian Dating site.
Previously, in any one area, there wouldn't be enough people to support such a thing and the expense of print advertising would also make it a non-starter. But with the web, all such things are possible.
Over and above the economic and technological aspects of course, if you're interested in Christian Dating then you should definitely check out the site.