They make money from it. Those are referall codes, the kind you give to your friend so you get a $10 discount on whatever the service is for convincing people t

They make money from it. Those are referall codes, the kind you give to your friend so you get a $10 discount on whatever the service is for convincing people to sign up. Furthermore, its messing with the actual URL you type out. This isn't declaring a user agent I. The background. This is intercepting and changing what you type to further their profit goals, which is unacceptable behavior from the browser.