Wow! I take the absolute opposite conclusion from your story that you do: you're getting the best rates I've heard of anywhere in the US, and you're complaining that it's somehow reflective of inefficiency!
I've lived in extremely rural, suburban, and inner-urban areas all over the US and I've never paid less than $60/month for 10/1. That your bandwidth isn't increasing doesn't sound to me like a bug, it sounds like they're amortizing their equipment over a long time horizon and giving you a great deal!
I've lived in extremely rural, suburban, and inner-urban areas all over the US and I've never paid less than $60/month for 10/1. That your bandwidth isn't increasing doesn't sound to me like a bug, it sounds like they're amortizing their equipment over a long time horizon and giving you a great deal!