How can you possibly not see these concepts as fundamentally related?
Yes, you're paying for a 250Mbps max connection speed, if your limit is 1000GB then you can only max out your connection for 9 hours a month, meaning other users have a chance to use the backhaul bandwidth, not just you!
Applying quota limits means less usage and allows for higher contention ratios to be used throughout the network. Which is absolutely the only way ISPs can afford to deliver you an Internet connection without charging thousands of dollars a month.
Yes, you're paying for a 250Mbps max connection speed, if your limit is 1000GB then you can only max out your connection for 9 hours a month, meaning other users have a chance to use the backhaul bandwidth, not just you!
Applying quota limits means less usage and allows for higher contention ratios to be used throughout the network. Which is absolutely the only way ISPs can afford to deliver you an Internet connection without charging thousands of dollars a month.