Promoting a post on #Ecency to that is beyond the 7-day curation period has many other benefits, such as the following: 🤓

1. More people reading your post (which is the overall benefit of post Promotion)
2. More engagement (by means of comments)
3. More upvotes (that count towards achievements even if zero value)
4. Higher chance of other users following your profile (and subsequently getting upvotes and comments for your other posts and comments) and reblogging your post
5. Receiving Hive Engine token tips (such as !LUV and !PGM)

If your priority is only about the curation of other users, then it's definitely inefficient to Promote a post past its payout time. 😐