That's a good point pokestake...
"...many of the high profile corporations of the world, their names are unique more often than not, and that is by design."
I think this is because these successful companies have spent years working very hard to create a company name they can be proud of. This company "identity" is a very valuable asset in and of itself! Do you have any idea what the name "Coke" or "Disney" is worth. Those names bring instant brand recognition to consumers of a quality product...a name they can trust!
It seems like it's always the companies that look like "small South Florida scam companies" that keep changing their names. Obviously if there is "no" value in your name, why not change it and try to hide from your reputation.