This second payout scheme was implemented recently, probably a few weeks ago, and that's why you don't see it in the whitepaper. Give steemit sometime, we're still a growing community, and things will get better from now on.

If you experienced searching for something relatively unknown on google, sometimes the articles or content can date back to perhaps a few years ago. Probably with tags alone, it might be difficult for others to look at your post in future, but i'm sure if your post happens to solve some problems in future, it will be looked up again. However from my understanding, at the moment, after the second payout. There will be no more payments available. However readers will still be able to upvote your post, to show it as a sign of appreciation. I might be wrong, and if I am, i hope somebody corrects me.

Steem ON!