Why wouldn't they think it counterproductive to try to sell additional services to someone who's not yet happy with what they're already getting?
If they have a CTV monopoly in an area, they want to try and get it all; also, vic--err, customers might be lulled into thinking that having to only deal with one bill is the way to go.
Sadly, we're finding that if any one part of the bundle package (landline, TV, internet) has any sort of issues the rest does as well...even if I can manage to track it down to something on their end--and prove it--they deny it. Mom said 'hell no!' when she saw their cell phone service ad.