I think this may be one reason why everyone has their panties in a twist over 6th day voting bots. If you upvote just in time for payout without giving others time to curate, you get all the curation rewards.

I don't think that people get you can still deny others curation rewards on a post you just created. For example, if you time your voting such that the vote happens immediately after you post, you also get all the rewards. I think the window is about 3 minutes.

Scenario

1. Bob submits bidding on a post that doesn't exist.
2. Bob watches http://steembottracker.com and waits for the voting bot to enter its voting phase
3. Bob submits his post
4. Within minutes the bot updates Bob's post
5. Bob gets all the curation rewards.

I'm not saying anyone should do this. I have been experimenting with voting bots, but I haven't tried this yet to see if it works. I probably will try it at some point just to find out. That way I can speak on it definitively.

If my theory is correct, the 3.5 day max age rule isn't enough.