True, but in Zynga's case their audience is going to be drawn pretty naturally to Facebook. Even at "max diversification" of their platform, it seems unlikely

True, but in Zynga's case their audience is going to be drawn pretty naturally to Facebook. Even at "max diversification" of their platform, it seems unlikely to me that losing their Facebook platform wouldn't be a crippling blow to Zynga. How many 15 year old girls are really going to want to go to a completely different site to play Farmville? 5%? 10%? Zynga's demographic primarily seems to be whatever the exact opposite of "hardcore power user" is. Granted, depending on how draconian Facebook's take is, that 5% or 10% might be enough to make them more money, but that seems somewhat unlikely to me.