In the last years, social media has gained an unprecedented amount of attention, playing a pivotal role in shaping the contemporary landscape of communication and connection. However, Coordinated Inhautentic Behaviour (CIB), defined as orchestrated efforts by entities to deceive or mislead users about their identity and intentions, has emerged as a tactic to exploit the online discourse. In this study, we quantify the efficacy of CIB tactics by defining a general framework for evaluating the influence of a subset of nodes in a directed tree. We design two algorithms that provide optimal and greedy post-hoc placement strategies that lead to maximising the configuration influence. We then consider cascades from information spreading on Twitter to compare the observed behaviour with our algorithms. The results show that, according to our model, coordinated accounts are quite inefficient in terms of their network influence, thus suggesting that they may play a less pivotal role than expected. Moreover, the causes of these poor results may be found in two separate aspects: a bad placement strategy and a scarcity of resources.

翻译：在过去几年中，社交媒体获得了前所未有的关注，在塑造当代沟通与连接格局中发挥了关键作用。然而，协调性非真实行为（CIB）——即实体为欺骗或误导用户关于其身份和意图而策划的有组织行动——已成为一种利用在线讨论的策略。在本研究中，我们通过定义一个评估有向树中子集节点影响力的一般框架，量化了CIB策略的有效性。我们设计了两种算法，提供最优和贪心的后验布局策略，以最大化配置影响力。随后，我们考虑了Twitter上信息传播的级联现象，将观察到的行为与我们的算法进行比较。结果表明，根据我们的模型，协调账户在网络影响力方面相当低效，从而表明它们可能发挥着比预期更不重要的角色。此外，这些不佳结果的原因可能来自两个方面：糟糕的布局策略和资源匮乏。