Can you elaborate on which town and who provides the service? The example above you cited Chattanooga and epbfi.com website that basic service costs $57.99/mo for 100 Mbs internet with no reference to a cap. Your comment seems disingenuous that you don't provide any details.
The linked article mentions that by Oct, 2013, the price for 1Gbit from EPB was reduced ~$70/month, and the folks who were paying ~$58 for 100mbit got bumped to 1Gbit at no additional charge.