Looks like Verizon this holiday is competing against it's rivals by offering existing customers more data for free, so they say so. There is nothing on the internet or it's website that it's free, but label it as a promotion. Only time will tell to see what their intentions are, but in the meantime if your a risk taker go for it and after the promotion you can always challenge their pricing against it's competitors and see what they will do for you. It's still a great treat regardless.
Link
Link