Linux does not HAVE a business model. The Linux kernel is developed primarily by individuals from around the world, with some contributions by various companies.
Business Model.
Here is a great definition from InvestorWords:
Business Model: A description of the operations of a business including the components of the business, the functions of the...
The true value of software-as-a-service (SaaS) and cloud-based software has yet to be fully realized, as IT departments have raised justifiable concerns around the security, reliability, and...
Theory: an explanation of an event that has been supported by consistent, repeated experimental results and has therefore been accepted by most scientists. Model: A verbal, mathematical, or visual...