Facebook gave preferential treatment to Zynga too, so that can't be the reason Google+ Games did not succeed. Perhaps it is more relevant that Google+ is not widely used and those who do use it are less likely to be into things like Farmville (demographics).
Facebook gave preferential treatment to Zynga only after they proved that they were the most popular. They had to fight their way there - it didn't start that way. It's still a bit dangerous to do so though because users' tastes may change, so good on Facebook for removing their special status.
As you said, Google+ had no such information, and gave companies special status out the gate before proving their popularity. If Facebook did the same thing, their top apps would probably look a lot different.
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Facebook gave preferential treatment to Zynga too, so that can't be the reason Google+ Games did not succeed. Perhaps it is more relevant that Google+ is not widely used and those who do use it are less likely to be into things like Farmville (demographics).
Facebook gave preferential treatment to Zynga only after they proved that they were the most popular. They had to fight their way there - it didn't start that way. It's still a bit dangerous to do so though because users' tastes may change, so good on Facebook for removing their special status.
As you said, Google+ had no such information, and gave companies special status out the gate before proving their popularity. If Facebook did the same thing, their top apps would probably look a lot different.
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