If they limit the rate of speed it's technically limited which really makes me wonder how they legally can say these things. I guess it means in a lot of cases it's like Comcast where they also limit the data a month perhaps but dang.

They mean that they're not going to limit the total amount of data that you send/receive beyond the natural limit implied by the maximum rate.

When a movie subscription says unlimited movies, we know they're not suggesting that they can break the laws of time, just that they won't turn you away from a screening. It's pretty normal language, used to communicate no additional limit, which is relevant when compared to cell phone data plans (which are actually, in my opinion, fraudulent) that shunt you to a lower tier after a certain amount of usage.

In the language of marketing (in the USA at least) the word "unlimited" means "limited".