Why use adbrite?

Why use Adbrite if we have Google ad sense.

I know that Google is one big player in this line but he is very different from all of them.

It is very difficult to use and to maintain.

Adbrite is so much simple to use and there is no need of having your account at 100$ you can have your 35 $ whenever you want.

This is the major advantage of having this type of system.