We don’t know what her real name is. But we do know companies around the world hire her to pitch their products. In the booming business of fake online testimonials, she’s a top seller: pretending to be a real customer and posting positive video reviews online. She's even posed as a certified financial adviser, a teacher, and a dietitian. Many of us rely on reviews and testimonials to decide where to spend our money, but there's an entire industry dedicated to tricking you into believing their hard sell.