The $12 billion pay-per-call industry has grown 16% annually since 2021. A consumer clicking a call button triggers sophisticated real-time auctions, routing, and agent connection in under four seconds. Callers demonstrate intent worth 10-12 times more than passive form submissions, justifying payouts reaching $400 per call. Mobile-first search behavior and consumer preference for voice during complex purchases drive market growth. Technology infrastructure enables sub-second call routing, AI-powered qualification, and real-time bidding. Near-100% contact rates for inbound calls versus 30-40% for outbound follow-ups explain why 78% of customers buy from the first responder.