Which retail sales strategy proved most profitable for military memorabilia stores during the WWI Centennial (2014-2018)?

During the centennial commemoration of World War I (2014-2018), military memorabilia retailers saw unprecedented demand for period artifacts and reproductions. This event created one of the largest retail opportunities in military history collecting. Different retail strategies emerged to capitalize on this once-in-a-lifetime sales opportunity, with varying degrees of success across different market segments.

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Limited-edition centennial collections with authentication certificates and provenance documentation
Low-cost, high-volume replica sales targeting educational institutions
Online auction platforms specializing in battlefield recovery items
Immersive VR battlefield experiences with attached gift shops