How much you earn and how quickly you earn depends on the quality of your content as well as the topics you write hubs on. I had quite a few hubs that were written to chase after higher-paying keywords, but I soon realized that the topics were things I knew very little about and the articles offered little value. I had those hubs published for about a year, and during that time all 20 of them earned me under 20c. I recently started publishing hubs on topics I know more about and deleted the older ones. My earnings went from 5c in February (with 21 old hubs) to 89c in March (with 5 fresh hubs), and this month I've already exceeded last month's earnings with 11 hubs in total. Granted, it is pennies, but it's growing exponentially and I think the quality of the content has a lot to do with it. I don't consider myself an 'earner' by any means, not yet anyway, but I figured sharing my experience might help you as well.