Even though they are considered a mobility device and have their own sim card, there are certain things a tablet line and plan can not do that a regular consumer cellphone line Can do such as no ability to make local or long distance calls and can not text on a tablet plan, so they "might" treat them under a different terms of service just because of the differences in the line. It definitely makes sense to have a terms and conditions Tailored to the actual type of line you have instead of having just a generic one fits all solution a lot of companies do this.
So I simply said to just bite the dust and pick up the phone and call them and ask, even if you have to wait on hold for 20-30 mins, it might be faster to get the info from them instead of on here, because in my personal experience, I know a lot of tech savvy people in my circle of friends and colleagues but no matter how smart or knowledgeable they are, when asked about buyers remorse and terms of service they honestly do not pay attention to those things and that itself is very scary.