A promoted post is displayed until its first payout. After that time it will no longer be listed on the promoted page index.

So why is the "promote" button still available to older posts? (posts that paid out one time but are not older than 4 weeks) That would drive user's to burn SBDs on older posts without benefit! (I was ready to promote one of my older posts to give it a second change!) BTW why not include posts that have paid once? Many would like to give a second chance to older posts and it would stream new money to steem !!!