Yeah, and that dollar symbol isn't the only symbol on the key, also provides you the information what the key does and allows you to type it and is used in many

Yeah, and that dollar symbol isn't the only symbol on the key, also provides you the information what the key does and allows you to type it and is used in many programming languages in addition to countries with the currency. The super key on the other hand with Windows logo provides no practical purpose, doesn't describe what the button does and is absolutely meaningless when you're not using Windows. The logo is just advertising, the dollar symbol is not.