Blinkit's business model is a dark store network business — fundamentally different from both the traditional grocery retail model and from the e-commerce fulfillment model that warehouse-based grocery delivery companies like BigBasket operate. Understanding the dark store economics, the revenue architecture, and the unit economics trajectory is essential to understanding why Blinkit's business generates investor enthusiasm despite currently operating at a loss. A dark store is a micro-fulfillment center of approximately 2,000-4,000 square feet located within a dense urban neighborhood — typically in a commercial basement, ground-floor retail space, or repurposed service area. Each dark store carries approximately 5,000-8,000 SKUs across grocery staples, fresh produce, dairy, packaged foods, household essentials, personal care, and increasingly non-grocery categories including electronics accessories, baby products, and pet supplies. The SKU selection is curated by demand data rather than the comprehensive assortment that a full-format supermarket carries — Blinkit stocks the items that its customer base in each specific locality orders most frequently, updating the assortment dynamically as ordering patterns shift. The delivery geography of each dark store is a radius of approximately 1-2 kilometers — the distance within which a delivery person on a bicycle or two-wheeler can complete a round trip (from dark store to customer and back) within the 10-minute delivery window that Blinkit promises. This constraint means that a single dark store serves a fixed geographic catchment area, and expanding coverage requires adding new dark stores rather than expanding each store's delivery radius. The capital requirement for each dark store — approximately 25-40 lakh rupees in setup costs (fit-out, equipment, initial inventory) plus monthly operating costs of 8-15 lakh rupees depending on the city and location — creates a predictable expansion cost model that Zomato can fund from its consolidated balance sheet. Revenue flows from three sources: the customer-paid order value (the price of groceries and essentials sold through the Blinkit app, which carries a margin over the cost price of inventory), the delivery fee charged per order (currently 15-25 rupees for orders above a minimum threshold, and higher for smaller orders), and advertising revenue from brands who pay for prominence in search results, category pages, and promotional placements within the app. The advertising revenue component — though currently a small fraction of total revenue — is strategically important because it is high-margin and grows with the user base and order frequency without requiring proportional cost increases. The take rate economics — the gross margin that Blinkit earns on the merchandise value passing through the platform — are central to understanding whether the business can reach profitability. Blinkit sources inventory centrally from branded goods manufacturers and local produce suppliers, with the central sourcing giving it negotiating leverage that individual local grocery stores cannot achieve. The margin between the cost price and the selling price to consumers — approximately 15-22% across categories, with non-grocery categories like electronics accessories and personal care commanding higher margins than grocery staples — must cover the cost of dark store operations (rent, staffing, utilities), delivery fleet costs, and the technology and corporate overhead that supports the network. The contribution margin trajectory — revenue minus direct dark store and delivery costs, before corporate overhead — is the financial metric that Blinkit management tracks most closely as evidence of unit economics improvement. Mature dark stores (those operating for 12+ months with established local customer bases) have demonstrated contribution margins of 2-5% of Gross Order Value (GOV) in Blinkit's disclosed financial data, indicating that the business model is economically viable at steady state even though the aggregate business is loss-making as new dark stores (which operate at negative contribution in their first 6-12 months) continue to be added faster than mature stores' positive contribution can offset. The non-grocery category expansion is Blinkit's most important medium-term business model evolution. The gross margins on grocery staples — rice, flour, cooking oil — are structurally low because consumers are highly price-sensitive and competitive intensity from local kirana stores and supermarkets keeps prices compressed. Electronics accessories, beauty products, baby goods, and pet supplies carry gross margins of 25-40% — significantly higher than grocery staples — and represent categories where the 10-minute delivery value proposition is genuinely differentiating. A consumer who needs a phone charger, a baby's diaper, or a pet's medication does not have time to plan a shopping trip and cannot wait 2-4 hours for scheduled delivery; 10-minute delivery captures both the convenience premium and the higher-margin category economics simultaneously.