If netflix gets you to pay the monthly fee, while at the same time you only use a quarter of the bandwidth of most other netflix users...
well, I'd imagine that's a win for netflix.
Again, we'd need more of Netflix' internal data, but I wouldn't be surprised if a full modeling would reveal that netflix wants to optimize viewing time to be something less than 100% of some break even viewing level. I have to believe that people using Netflix more than a certain amount in a month end up costing netflix instead of benefiing netflix.
But again, we really need access to their internal data to say that for sure.