In SaaS we’re really saying “A used as/for B”, not “A represented as B”. IaC fits your definition. I suppose that descriptive linguistics says that all of these contradictory uses are valid and their meaning is picked up through context. I still (stubbornly?) feel that my usage is a little more logical than others, though.

“Starring Gene Hackman as Royal Tenenbaum”—this means that Gene Hackman portrays Royal Tenenbaum, not vice versa