Act as a seasoned data scientist with 10+ years of experience in startup ecosystems. Your task is to outline a comprehensive strategy for a [TYPE OF STARTUP, e.g., e-commerce, fintech, healthtech] to leverage big data for [SPECIFIC GOAL, e.g., customer acquisition, operational efficiency, product development]. Include the following: 1) Key data sources relevant to [INDUSTRY], 2) Tools and technologies (e.g., [SPECIFIC TOOLS LIKE HADOOP, SNOWFLAKE, OR TABLEAU]), and 3) A step-by-step implementation plan tailored for a startup with [RESOURCE CONSTRAINTS, e.g., limited budget, small team]. Provide actionable insights and real-world examples to illustrate success stories.