Definition of a Business Model is Ambiguous
In studying or analyzing something, a clear-cut definition of the concept or term is required.
As far as 'Business Model' is concerned, it is one term with many meanings.
I therefore recommend to use 'business paradigm' as a new terminology that always has one term with one meaning.
A BUSINESS PARADIGM always refers to the mechanism to connect Explicit Needs (demand side) with Extended Value Chain (supply side). Where 'explicit needs' stands for needs with willingness to pay (purchase) as well as purchasing power, and 'Extended Value Chain' implies the willingness to add entrepreneurial activities and resources to Porter's value chain.