Santa Monica, CA
·Time Warner Cable
Virtually no one, 'cept the few who are abusing their service, and/or out to prove they can, or because they need to fight-the-machine, or in Sprint parlance, "stick it to the man".
Implementing the caps and throttling costs little money versus the lost goodwill if the network is saturated by datahogs. The mere existence of the policy shapes behavior for most, and keeps the system usable.