For at least portable devices one must purchase network time through Microsoft. Win10 > Under all files > Microsoft WiFi > is this ToS, it's not a link but a local file.
Found by clicking on the lone title of "additional terms" - It's a pretty good read, below and the third party abilities only confirms Win10 as spyware.
"SERVICE . After you select a Service plan and buy it, you will be connected automatically whenever you’re near an access point that provides the Service (and is within the country in which you originally purchased the Service plan) and you have time remaining on your plan. Your connectivity begins immediately after you buy a Service plan through the Windows Store and ends at the specified expiration time, regardless of how long you are actually connected to the Service. You cannot save time for later. You must actively maintain your connection and you must be within range of an access point that provides the Service in order to stay connected. If (i) your usage remains on standby; (ii) your usage is inactive; (iii) or your Service plan has expired, your connection may be terminated. Microsoft reserves the right to terminate your connection following any extended period of inactivity."