I've got the same question. Bots are already gaming the STEEM blockchain pretty hard. From what I read in this article, it almost sounds like people will be forced to automate their accounts if they want to optimize their investment.
I mean if we both invest $10 into our accounts, my account will be more powerful if I run a bot while I sleep, and you don't.
I'll be interested to see how this plays out. The gravity index is an intriguing concept.
Fake activity will cost more than the profit one gets from the emission