Haha you can tell when opinions are offered about services that the speaker doesn't use.
Netflix is laggy on movies (in terms of how long before Netflix gets access after initial release) and extremely hit or miss on selection. They're canning Stars and picking up Disney, which still gives them a very low total % of movies, and still prevents them from accessing the movies early.
Popcorn Time lets you watch rips and cams long before a legal Netflix has access.
People aren't using Popcorn Time to watch content available on US Netflix, they're using it to watch content that is locked behind contract and available in theatres or still in various exclusivity periods.
The same thing they use Bittorrent for. Go check the top downloads right now on a major tracker: None of the popular movies are available on ANY Netflix.
It's frankly delusional to think that Netflix's laggy, spotty access to last years movies will "kill" a service that illegally grants you access to movies earlier than Netflix will ever get.