I tried gaming curation for a while way back. It never has done anything for me, but I had basically just the delegated 15 SP back then. May be different when you have more.
If you want to maximise curation, you have to find someone who posts regularly and get's decent rewards for as little upvotes as possible, ideally by people who are not following him via steem auto or similar services. If you do and give that person an automated upvote between the 15. and the 30. minute of his post, you can usually reap a decent curation reward.
Even then, this curation reward is usually not big enough than the benefit of bonding with someone by commenting and upvoting his content and making a potencial follower out of him.