I'm sure it's for some added features.
I would like to caution you how eber on Razer keyboards. They look really nice and have some great features an they have nice lighted keys. They are however hard to clean and there is a coating on the keys that give them a soft feel but I t5hink it's this coating that's the problem.
If they would do away with this coating I would go back to Razer keyboards. I don't know what the purpose is of this coating but it really interfers with cleaning and it can easily wear off.