How Much Demand Remains, in U.S., for Low-Cost Broadband?

Comcast, the U.S. cable TV and internet company, has had significant success offering its own low-cost broadband service to low-income households, signing up about eight million customers for a 15-Mbps service costing $10 a month. Most other major internet service providers offer something similar, though it seems few have been as successful as Comcast. 

source: Axios

While government subsidy programs will continue, and can be important, one wonders how much demand exists for customers who would buy, but believe the cost is too high. Most customers who value fixed network internet access likely already buy.