lol… 30 terabytes?! Okay. I’m sure even Google Fi has a cap like that. Most people would struggle to even come close to that. It’s 30x the cap of even a home internet provider like Comcast, which usually limits you to 1 terabyte. Most people would have a really hard time hitting even that on their mobile.
The other thing to consider is Visible is cheaper than Google FI too. And most people aren’t going to use anywhere near 30 terabytes.