These terms typically point to specific online pseudonyms, creators, or channel names within underground video-sharing networks. In these communities, creators often produce exclusive, paywalled content for a dedicated subscriber base.
The AACR Report mentioned above features "Maddie" (page 44) regarding the causal relationship between smoking and health.
This term appears in industrial contexts, such as a lightweight board product developed by Ikea Industry or a manufacturer of battery components.