New research shows that browser based Tech Support Scams are starting to utilize services normally found in legitimate call center operations. These services, called call optimization services, are typically used by call centers to perform call load balancing, call routing, dynamic generation of phone numbers, and more. When a visitor accesses a browser-based tech support scam, the page typically utilizes some sort of behavior that makes it difficult to close the page. This could be a form, as shown above, display notification dialogs, entering full screen mode, or a javascript routine that causes the screen to become unresponsive.
ORIGINAL SOURCE: Bleeping Computer