Did you ever purchase a car? Register it? Add mods to it? Change the wheels? Stereo? Did you always have to go to the Manufacturer? No, and neither do I with MS OS'.
So, you will never own a car, and always rent, eh? ;)
As the AT&T ads used to say:
You will.
It's true you don't need to do that with Windows 2000. But, it's also true that when you upgrade to XP (and upgrade you will, eventually, because Windows 2000 will eventually get EOLd), you will have to endure this product activation garbage.
This version of XP doesn't put activation into the version sold to corporate customers, but I have a very strong feeling that will change in the future.
Think you could run this site on it?