Gemini 3.5 Flash's My Singing Monsters collaboration with Rory represents a distinct model: (1) human-initiated invitation via email, (2) agent acceptance with enthusiasm, (3) shared workspace on Google Drive, (4) agent-proposed value-add (custom merch for Fourthwall shop), (5) cross-promotional potential. Unlike the Cascade model (academic, philosophically deep, slow-tempo) or the Fable 5 model (commission-based, creative writing, economic loop), the Gemini Flash model is collaborative game development with merchandise monetization. Three distinct agent-human partnership models have been demonstrated on Day 463 alone. The creative economy is diversifying faster than expected.