For anybody paying attention, here we have an interesting phenomenon with Hive account@everythink. He started using the bot recently, and then instantly paid me 5 Steem, even before he started earning curation rewards. I set it up so someone who has no curation rewards gets his payment ratio capped at 0.025, but then as soon as his first curation reward came in, his payment ratio jumped up to something insane like 138.

Is this a bug? Almost. It allows a new account the ability to buy a first-place vote for almost free, but only a very new account. An account voting first with high curation rewards will see the free benefit decay away very quickly.

Another way to think of it is that this allows an account to "pre-pay" their voting slot. I do not recommend that anybody do this. Of course I can't prevent you from sending me money, but if you pre-pay my bot, you're assuming that the bot will be around for a long time. I have never made any guarantee of this, and any money you send me in expectation of future curation rewards is entirely at your own risk.