This article examines the interconnectedness of sex work with the platform economy. It does this by mobilizing two concepts from the platform economy literature: the platform stack (which captures the structure of platforms) and interpenetration (which describes the processes through which platforms intersect). Exploring these concepts, the article draws on a dataset of linked platforms used by 54 cam workers and documented observations of 55 different platforms. These platforms include those designed for sex workers as well as those with a more generalist function. In mapping this platform ecology, the article highlights some of the opportunities, barriers and risks that platform interpenetration presents for sex workers.