We had the objective to increase the number of fans on Mega Image's Facebook page. We could have said 'press like, press like', but instead - we let the consumers engage their friends: we offered one year of free shopping for the one who got help from the highest number friends. We called it 'the longest shopping list': every day one could ask his friends to buy virtual products for him. How many friends one could ask? The more the merrier! Up did it went the number of fans.