This is actually an interesting point - Shaw's VOIP service similarly doesn't count towards cap. As mentioned in the update to the ArsTechnica article, the movie service not counting is apparently because it is delivered via different infrastructure -
"Shaw's existing video-on-demand QAM cable infrastructure. When users access Movie Club through a computer, they will access an IP-based version of it delivered over the Internet—and this will affect monthly data caps."
but surely the VOIP phone data is delievered over the internet...
The VOIP data is probably not delivered over the internet for local calls. The calls probably come out of the cable network and hit a softswitch in the same city. For local calls, they probably have a TDM interface (T1s/DS3s etc) to the incumbent carrier and possibly other CLECs too.
"Shaw's existing video-on-demand QAM cable infrastructure. When users access Movie Club through a computer, they will access an IP-based version of it delivered over the Internet—and this will affect monthly data caps."
but surely the VOIP phone data is delievered over the internet...