So what are you going to do? The easy thing would be to just shut it off, but more amusing thing would be to make the news links nonsensical (ie go to Onion etc).
Of course, the best thing would be to get your own cut of the revenue.
Instead of cutting it off, can you just add some ads on the page? Many will probably complain, leave 1 star reviews, and stop using the app, but in the meantime you'll make some money off the app (even the free version).
Whatever ethical issues inherent in profiting off scraped content have already been bypassed by asking for money, though any issues with the law could be a bigger concern.
Of course, the best thing would be to get your own cut of the revenue.