I am with @steevc. I think the far better ROI will be achieved by a rise in STEEM-price. So acting in a way that favors the growth seems to be the better strategy in the long run.

And that strategy would be n^2.

Under n^2 the rewards for my posts would shrink a lot.
I would probably not earn much from posting anymore.
My Steem had at least the chance to become really valuable then, though.