Oversimplified, Rocket Internet (Samwer brothers) generated billions cloning apps and services. Many other examples exist. Thinking of costs as "almost nothing" is misleading, but the low cost of cloning services and apps is a business model with a strong track record that seems to have accelerated due to AI. Of course, competition within this business model is also accelerating, making profitability more complex, and ethics is always complex in this space.