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Developers upset with Facebook's antiviral measures tell us enthusiasm for Facebook's platform is waning. Nonsense, says Steve Cohen, the head of platform engineering at Facebook rival Bebo. Earlier this year, Cohen built a platform for Bebo that was entirely compatible with apps built for Facebook. Cohen told Silicon Alley Insider that Bebo's big worry right now isn't that Facebook's redesign will kill developer enthusiam for the shared platform, but that a new Facebook platform will leave Bebo a step behind. Said Cohen: “Facebook really threw a monkey wrench in the whole compatibility thing. If we’re not compatible with Facebook, no one is going to develop for our platform.”