The cost difference between infrastructure for delivering a 100 or 1000mbps capable connection is negligible. It's delivering it sustained to multiple people th

The cost difference between infrastructure for delivering a 100 or 1000mbps capable connection is negligible. It's delivering it sustained to multiple people that's hard. There are arguments about whether it's better to divide 1000mbps of bandwidth equally between 10 people or giving them all the ability to consume the full 1000mbps. It really depends on the traffic load, most people will never keep a 1000 Mbps connection saturated but as soon as someone finds a way it will negatively impact everyone else sharing the bandwidth. The reality is most ISPs don't split 1000 Mbps between 10 people to give them each 100 Mbps, they'll split it between 20 or 30 people and give them 100 Mbps max because those provisioned customers are all unlikely to demand their full 100Mbps simultaneously.