That’s wonderful Play. I absolutely love the idea of placing banners that you referred the player who won. Just like the lottery, when someone hears of a winner at a certain establishment, many times over the establishment (website) gets bombarded with new players seeking out a lucky spot to help their chances of winning. I guess they think if it happened once, it can happen again. This can also stand true for portals, guides, forums, etc.
Congrats!