When you have traffic, you can sell anything. Without it? You may have the solution to world hunger in your hands, but no one will ever get to see it. Engagement and followers comes over rewards, as they shall arrive with the upvotes :) It's all a numbers game in the end. If you have a few thousand followers on here, it's safe to say you COULD be put in a position where if you're rent and such costs are low enough, you could make a full-time living doing Steemit.