Using Steemauto for curation is a very independent and uncomplicated way to earn curation rewards. I use Steemauto to support over 20 authors and it generates curation. I don’t know if it earns more then delegating and sharing curation rewards. The way curation rewards is awarded is influenced both by the size of your SteemPower and the timing of your vote. So a small Steempower account voting at 5 minutes post age may get a larger portion of curation then a larger Steempower account voting at ten minutes post age. But if they vote at the same time the larger account gets more curation. So it’s complicated, but what your doing is not complicated and it is profitable. You may wish to divide your Steempower and see which option earns more.