Related to liked pages, I've noticed a few times in the past month or two that friend's months-old status updates that have links to products on Amazon.com now

Related to liked pages, I've noticed a few times in the past month or two that friend's months-old status updates that have links to products on Amazon.com now re-appear in my current news feed as "sponsored posts". So it seems like advertisers can also sponsor posts containing links to their domains to re-appear in your feed.