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The Internet of Things (IoT) has remarkably evolved over the last few years to realize a wide range of newly emerging services and applications empowered by the unprecedented proliferation of smart devices. The quality of IoT networks heavily relies on the involvement of devices for undertaking functions from data sensing, computation to communication and IoT intelligence. Stimulating IoT devices to actively participate and contribute to the network is a practical challenge, where incentive techniques such as blockchain, game theory, and Artificial Intelligence (AI) are highly desirable to build a sustainable IoT ecosystem. In this article, we present a systematic literature review of the incentive techniques for IoT, aiming to provide general readers with an overview of incentive-enabled IoT from background, motivations, and enabling techniques. Particularly, we first present the fundamentals of IoT data network …