I use an obihai with a google voice number.
http://www.obihai.com/product-primer
Once you buy the Obi unit, most if not all calls are free (with a GV #)
so, something akin to a chase nipple ?
https://www.platt.com/platt-electric-supply/Nipples/Chase-Nipples/search.aspx?q=CHASE+NIPPLES&SectionID=9&GroupID=126&CatID=472&SubCatID=5648
I completely disagree.
In the case of traditional utilities, something is actually "made" electricity, water, etc. and then distributed. So usage based billing makes sense.
In the case of the internet, we aren't making "bits"; there isn't a finite amount of them.
The "last mile"...