My feeling is that Google is acting like a monopoly. It's wrong that a private company is able to exert this much power over others, even if the others are being shady.
I understand the facts of the situation--a rap lyrics website HAS to build around Google to achieve optimal success. But if you aren't willing to give away that much control, build a less-successful version or just find another business.
If you're a content producer, you should absolutely be looking for ways to promote other search engines (and other traffic sources) as a hedge against getting screwed by a change at $DOMINANT_PLAYER.
Google just happens to be the monopolist (and, furthermore, the cartel) in search.
That said, the landscape was already formed when they made that decision, so I imagine it was an informed one and doesn't change the meat of my comment.