there are a few reasons why Zynga is well-suited to use this combination of public and private clouds. The first is its business model, which involves games that have a tendency to be boom or bust. Rather than spending on computing resources of its own before the launch of each game, it's much more cost-effective to use amazon's cloud services until Zynga can move accurately predict the computing power it needs. As a recent start-up, Zynga lacks the accumulated legacy systems and infrastruc-ture typically found in older companies. The more systems a company has, the tougher it is to integrate its applications and data with cloud systems.