Apologies, Allan. It was referring to the wrong product. I had worked with Krum on something like you asked, at the same time he worked on this hack.
Here is the “correct” answer I should have shared. You can set the time when something will show to the public. I have used that in the past, although it was not on a post, but on content inside a page, so I am not 100% sure it will display the whole post the way you want. I am not a programmer (which is why Krum does that for me). Here is a sample, as I used it, to show some content on an daily basis.
<?php if date("Ymd") == 20121021 { ?>
<img src="http://scrapbookcampus.com/Images/PlaidPaper1.jpg" border="0">
<?php } ?>
<?php if date("Ymd") == 20121022 { ?>
<img src="http://scrapbookcampus.com/Images/Paperclip.jpg" border="0">
<?php } ?>
So this is a code where I set it so the first image displayed while it was October 21st, 2012, then on the 22nd, another image was to be displayed, and so on.
For your need, you might want to add your text inside something like this:
<?php if date("Ymd") > 20121021 { ?>
put the content in here
<?php } ?>
Maybe this can help you get the exact coding you need?
And for the affiliate link, first, it was the wrong one, but mostly, I use the affiliate link to only track the sales but NOT to get a commission.
Hope it helps.