Other than creating their own APIs, call center units can use other popular ones for advertising
. BPO units can create a banner or a widget that can easily blend with the API that you are using as a vehicle. It's also important to keep the customer service department ready to answer calls and other information about the brand. Generally these methods of lead generation are expensive and often clients shy away from them because of the cost factor. So if you do it, you must utilize it to the hilt. Call center services have to well-prepared for the impact of such APIs.