If the platform is too closed—if it is too onerous for extension developers to hawk their wares on the site—it will lose the opportunity to provide valuable extra services to platform users, perhaps alienating participants in the process. But if the platform is too open—if it is too easy for extension developers to appear on the site—then it’s likely that poor-quality service providers will join the platform, tarnishing the reputation of the other developers as well as that of Airbnb itself. Furthermore, excessive openness may lead to too many providers of the same type of service, which will
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