This chapter challenges the popular narrative that open-source software will democratize generative AI (GenAI) and disrupt the existing oligopoly dominated by companies like Google, Microsoft, Meta, and OpenAI. It argues that Big Tech routinely “weaponizes” open-source projects (e.g., Linux, Android, PyTorch) as a strategic tool to gain a competitive advantage over rivals, not for true democratization. The analysis shows that despite impressive percentage growth from startups, the absolute market value gains of tech giants have dwarfed those of new entrants. The enduring concentration of power stems from eight key levers favoring Big Tech: vast capital, exclusive proprietary datasets, massive access to compute (GPUs), network effects, control over top talent, market access agreements, a high-interest investment environment, and a lack of a viable business model to unseat their integrated ecosystems. Ultimately, the chapter concludes that open source in GenAI acts as a “fig leaf” for corporate dominance, as these massive companies control nearly every link in the GenAI supply chain – making radical openness unlikely to have a meaningful impact on the existing power structure.