The oldest mention of "markitecture" I can find dates back from 1990 :
CA 90s was characterized as a "markitecture" by
Jeff Schulman, vice president and analyst with the Gartner Group, Stamford, Conn. "It is a marketing architecture, a statement of direction. It does not specify when products
will be delivered, or which products
will map to the architecture. It does not help users in a specific sense, only in a general sense".