I don't know what everyone else does or what motivates them. Most people just simply sign up for the voting bots.
I think if you want to give them even more incentives or get me to stop manually curating and give up and go to the more effective bots, you should increase the curation rewards. I'm getting tired of curating anyway. :)
I am already taking a loss manually curating. I could do much better using a voting bot. If I lose post rewards and walk away from more curation rewards, it would be time to rethink my current activity.
Notice the word Manual. The larger you make curation rewards the more I am going to care about what I am walking away from by manually curating.
Make the rewards large enough and there is no reason to engage with the site at all.