Anyways I remember fortune cookies from Cataclysm. I tried getting people to use them as a allpurpose buff food at a lower price then specific buff foods (plus, for every 1000 made I could make like 5 duplicates of darkmoon cards!)
The problem I had with them though was that everyone who i gave them to immediatelly started spam eating them to try to get the 5,000g card and forgot to wait to get the buff.
Results? Someone won the 5000G card, then everyone tried getting it, and then they all started calling me a scammer, and then my raid leader got a fortune cookie that said he'd fall in love with a death knight, and ended up getting transformed into a leper gnome with a leftover magic wand i had.