DintFeed post notifications for new articles by default.
If you want to ignore the notifications, you can change settings in System Preferences.
Go to Notifications in System Preferences, select DintFeed in the list, then you can
change the notitfication settings for DintFeed.
You can turn off notifications of DintFeed, this way the new articles badge will also
be turned of.
To show badge icon without other notifications, you could try the settings in below image: