What is the definition of the economy of Internet according to the text?

The economy of Internet is the set of activities associated with the creation and use of the Internet networks and services, including all Internet activities and the part of the ICT sector related to the web.
The economy of Internet is the set of activities associated with the creation and use of the Internet networks and services, including only the activities related to e-commerce and online advertising.
The economy of Internet is the set of activities associated with the creation and use of the Internet networks and services, including only the activities related to social networks and online communication.