Honest question (I may have misunderstood): Do you mean to imply that those are good prices? For reference, I'm paying about $40 for 1000 mbps (I'm not in the US). Can go to 10gbps for about double that price (IIRC), but I think the bottleneck becomes server bandwidth so it wouldn't speed me up for most services.
$80 USD for 1000mbps in Tennessee, USA. Unfortunately I have the best internet of all my friend groups and will be moving across town to a newer home soon where the best I can get is 50mbps for $50 USD.
It is completely random what internet speeds you can get. The only constant is the monopoly of Comcast & AT&T.
A duopoly can be a distinction without a difference if there's territory-dividing collusion, or even just game-theoretically "optimal" moves by the players towards a sub-optimal state for the customers.
