Big spenders or "whales" are much ignored when considering how to make money with a game. There really are people out there that are willing to spend thousands a month on a social game. You could even think that all the other players merely exist in the game to entertain that small slice that really brings in the money.
In my own apps with virtual currency I could see this only in a small way as the incentive was low to spend a lot, so this is more based on the experiences I have heard from fellow devs.
In my own apps with virtual currency I could see this only in a small way as the incentive was low to spend a lot, so this is more based on the experiences I have heard from fellow devs.