As the streaming service wars heat up even more with the arrival of HBO Max, Netflix is actually making a move to save its idle customers some cash. One of the biggest potential pitfalls of signing up for subscription services? Remembering to cancel that subscription when you’re no longer using it. Even as someone who’s very mindful of her spending, I’ve fallen into this trap more times than I’d like to admit. (I swear, I really was planning to learn a new skill on Skillshare at some point!) But rather than continue to keep charging those …