From the next update you will be able to decide which posts will be published and which posts will not be published from a RSS Feed. You will get two new fields in the RSS’s settings. First field will allow you to decide to publish posts which contains one of the added words. Second will allow you to decide to exclude posts which contains one of the added words.
In this way you will be able to exclude posts from different categories and publish posts only interesting posts.
You can watch in the video below how to use the new options: