I'd look into Facebook's actual app policies if I were you. What made Farmville successful was to basically bribe players into sharing by rewarding them with i

I'd look into Facebook's actual app policies if I were you. What made Farmville successful was to basically bribe players into sharing by rewarding them with in game currency. This resulted in a ton of spam. If that's not outright banned by now, it's possible the feed filter makes those messages all but invisible regardless. They want people to pay to advertise now.