gerfriedc Yes it is quite easy to setup news or information streams, as you simply create a compiler in Python or NodeJs that pushes info to a stream. You then publish a product on the Marketplace with that stream and simply select the price you would like to charge. Anyone could subscribe to it to receive any specific or niche information, whether is news, market sentiment or trading suggestions or articles summaries etc.
If you want to even abstract that even more, you could create a browser plugin or mobile app that allows users to actively select whichever data streams they are interested in getting info and render the content on the app/plugin by subscribing dynamically for each user to the right stream. You can do a mix of free/paywall service that way too.