Torrenting of Game of Thrones most likely doesn't hurt the show's profits. It's one of the most popular shows on television today and HBO relies on subscription fees instead of advertising dollars.
This isn't the case for a less popular show. Shared shows don't show up as tracked views and can and will affect real things like ratings and if a show gets picked up the next year.
The end result of this will be product placement right in the show, so sharing it will only help make money for the show creator. It's very similar to all of the people using Ad block: eventually, companies will have to resort to articles and content being one big advertisement.