After the desktop of the domain investor was hacked to prevent her from updating the websites , the domain investor was forced to reduce the time she spent doing computer work.
So instead of accessing using wifi hotspot, she was using cellular data in the smartphones.
When she was using the wifi hotspot, she was getting the message that the 2GB data provided was getting over.
Due to desktop hacking for almost one month, the wifi hotspot was used for only one hour or less daily. During this period, the domain investor found that she never got any message regarding data usage, showing that wifi hotspots are used to rob bandwidth.