Cheap traffic can inflate numbers, but poor conversions quickly scare away advertisers. Fraud detection becomes constant work because bots, fake clicks, and low-quality publishers drain budgets fast. Payment processing is another challenge since many banks and platforms restrict adult businesses, increasing fees and risk. At the same time, regulations and content policies change often, so staying compliant across countries takes continuous monitoring. User retention also matters because audiences move quickly between platforms and trends. Long-term profitability comes from building reliable traffic sources, maintaining reporting, and protecting both advertisers and users from scams or misleading placements.