“…Scholars predominantly focus on the B2C digital marketplaces at advanced stages with an established pool of complementors and customers (Cennamo, 2019). In the B2B context, a platform sponsor usually develops a proprietary platform with an exclusive set of complementors and customers (Eisenmann, 2008;Rietveld et al, 2019) and gradually opens up to other complementors (Broekhuizen et al, 2021;Cenamor and Frishammar, 2021;Wei et al, 2019). Thus, the emergence of a platform ecosystem in the B2B context gradually unfolds through close collaboration between a platform sponsor, complementors, and customers (Enkel et al, 2020;Granstrand and Holgersson, 2020) as well as competing platforms (Adner et al, 2019).…”