You can ask for your upload to be uncapped, but I'm sure that most users will not even be aware that they can ask for this. Plusnet say they are running bulk scripts to uncap users, but we've no idea how long this is going to take to complete. In the meantime the system is still ordering new connections capped (confirmed by a member of their digital care team on the Plusnet Community forums today).
* Manual orders are usually uncapped
Plusnet user since November 2001