I guess it will really depend based on your target audience and how you can make yourself stand out.

In all cases you can try with the following:

1. PR
Focus on getting publicity from blogs and online media sites. This will help you a lot when it comes to user acquisition (your target is already there, otherwise they won't be reading news)

2. You might try Facebook ads to drive traffic to landing pages to generate leads. Offer educational content that requires opt-in.

For example: "How to read all the news in less than 30 minutes per day". In the past personally I spent about 1,5 hours per days readying news so if you teach me how to do it faster, you wont me already.

Try with downloadable ebooks, webinars, etc.

I hope that helps. Feel free to schedule a call if you need more help with that. I'd love to give you my advice on that.