The most common plan generally offered was the service-specific data plan. Service-specific plans offer data bundles at discounted rates that give users access only to specific applications and sites, over a given web browser, and/or for a specified period of time. They are often part of operators' marketing strategies to increase their customer base by providing discounted access to popular sites and applications. In Bangladesh, Kenya and Colombia, customers can also 'earn' extra data, for example by watching a certain video, or by buying a specific device.