What is an “orbit”?

Okay, so I phrased that poorly: in marketing, “orbit” is a verb. According to businessdictionary.com, “orbit” means:
In marketing, practice of rotating a radio or television commercial among different time slots to achieve greater reach (net audience).
Pretty simple concept- take one piece of advertising and present it to several different potential demographics. I wonder whether the term has taken on new shades since the advent of online (especially social media) advertising. “Orbit” might have too long of a connotation… “revolution”, “spin”, or “twirl” might all fit better in the world of super-short, super-targeted, context-sensitive digital ads.
Short URL for this post: http://tmblr.co/Z19Kyx2vni0X