How do you think free sites pay for producing all that valuable content? I find it astonishing that most people seem to think having access to news for free is almost a right. If you had taken their paid subscriptions they'd have served you a less add riddled version.
I've been using http://www.pentesteracademy.com/topics for many years now. Highly recommend them esp. for Network Pentesting, Windows Red-Blue teaming and others.