There are lots of folks, who are not developers, who would want to send a linkedin invite to every new twitter follower, or get emails about the top apps in the app store, or log all your text messages to google drive. Heck, developers who don't want to spend the time to build and maintain a system would use it also.

Check out their recipes for a better understanding of how people are using the service: https://ifttt.com/recipes

Agreed on your second point.