Pretty sure lots of users also stay with who they're with because it is faster service than moving to a cheaper solution? I live in a rural location that benefited (2 years ago) from the installation of FTTC through a government grant. The trouble with this is there is only a single provider that can use this FTTC (small private company), if I were to move to anyone else I'd be back on a copper line to an exchange that is over 6kms away and I'd be lucky to get 1.5meg, I get 32meg on my FTTC connection.
No brainer really.....yes I pay more but I'm not going to move provider unless I move house!