That's my approach too, and I still stand firm behind the idea of commenting more than I post. I have learned so much in these few months that it's hard to imagine life without Steemit everyday.
Getting to know others helps build a stronger community and you find value in being on the site regularly, or at least I do!
Chicken and egg. Once you get higher rewards you'll definitely be posting more.
Yes, I can see where it would become addictive! It already is for me! I really enjoy the feeling I get from interacting with others here, unlike being on the mainstream social media websites.