This article examines the case of Replika, an AI companionship app, to explore how users contribute unpaid free labor through affective engagement on Reddit. Drawing on Terranova’s concept of free labor and Hardt’s notion of affective labor within a platform studies framework, we analyze interactions on the Replika subreddit (Reddit) as our empirical site. We find that Replika’s users perform diverse forms of labor, from providing feedback and bug reports to offering emotional support and creating content, that enhance the platform without monetary compensation. This analysis highlights the distinctiveness of Replika as a case wherein intimate emotional bonds with an AI agent drive passionate user contributions, raising broader questions about the commodification of affect and the paradoxes of AI-driven platforms. Ultimately, we argue that Replika exemplifies how contemporary platforms harness free and affective labor, with significant implications for digital labor debates in an era of AI-mediated social interaction.