@marc99 we often feel the best about combing a return with doing some good and giving back which is the intention of the system we have setup with the budget proposals and voting bot. Other bots at https://s3.amazonaws.com/yabapmatt/bottracker/bottracker.html may provide a higher return by giving back most of the earnings directly to the delegator. I believe @boomerang gives back 100% of the delegated earnings plus some of the curation rewards as well.