Well they will never not bring in revenue. Its all a question of if they maintain enough subscribers/revenue to surpass there expenses, which is in no way a guaranteed thing. There are two unfortunate ways that can happen currently, and they both are based around NZR content rights. Either Sky lose them to a competitor at the next renewal date (and sky hemorrhage a big chunk of subscribers/revenue) or Sky win the rights again but the cost increases to a level where they eventually lead to an operating loss.