Who the heck signs up for $45 a line when five devices is only $65?
The sentence in the summary (and TFA) was badly constructed. The cost is $65 per line unless you are a X1 customer - then it's $45 per line.
Comcast's pricing never ceases to amaze me. I'm a Comcast cable customer, and for a long time I routinely got these advertisements trying to get me to buy this thing called "Triple Play" where you add an IP voice line to your cable TV and internet. The price for the IP voice line was something like $70-80 after you got out of the "discount" period... and even the "discount" price was something like $40!