The difference with major online services like facebook and twitter is that games have a -very- big launch, and get a lot of users at the same time all at once. It&#x27;s really hard to test for all that traffic in advance, as there will be so many configurations, (slow and fast) connections, hackers etc coming in all of a sudden. Its almost impossible to simulate the enormous variation.<p>Facebook, Twitter etc begin by a stable (code) base and then step by step scale up their systems. When something does not scale they can roll back or quickly fix it. They don&#x27;t have to ramp up from a few hundred players to hundreds of thousands in a few hours like in the gaming industry.