Web Playgrounds of the Very Young
nytimes.com
nytimes.com
The guy didn't start with empire-building intentions. He just had small children and couldn't find anything for them to do online. It turned out a lot of other people had that problem as well.
There was an interesting benefit of being acquired by Disney. Apparently CP was defending itself against a flood of lawsuits claiming rights to the penguin brand. When Disney bought CP they called everybody up and said, "You don't understand. We're suing you." The lawsuits stopped.
2008: (Disney) let's help ourselves buy another yacht by blasting pre-teens with ads!
While snazzy rendering won't really go anywhere with these games, server side physics just might -- you can control the platform, and as the games move from "pre-teen" to "young adult" you get into domains where realism (in the sense of convincing motion, compression of rubber objects and the like) can add a lot even without fancy rendering.