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Whether Facebook can sustain or increase this growth in the apps sector remains unclear.

“You don’t really know what the marketplace will look like, you don’t know who will enter, who will leave,” he said.

Mr. Enderle is confident that Facebook will be five to 10 years down the road.

“You could have said that about the software market, and the iPhone market, too,” he said. “At some point, as the ecosystem matures, the strongest survive.”

Mr. Hann doesn’t expect this market to going away anytime soon. “We will certainly see growth in this part,” he said. “This is clearly only in the early stages.”