From surviving a near-fatal accident to spending $20,000 a month on TikTok server crawling, Mayacrew CEO Jun-ho Oh built a global growth engine without VC funding. Through extreme data analysis, his team cracked the U.S. commerce ecosystem—scaling brands to $800K/month and sparking an organic endorsement from Cardi B. Here is his story of resilience, data obsession, and building a world-class enterprise from the ground up.