Multisided platforms. as pointed by Rietveld et al. usually start with a single-use just as Amazon was a place to buy/sell used/new books until it scaled into selling close to a million unique brands. Platforms started for a singular purpose later; scaling into multi-purposes calls for certain governance limitations. https://www.alarecre.com/Disney-The-Nightmare-Before-Christmas-Lock-Shock-and-Barrel-Art-AirPods-Pro-2nd-Gen-Skin-p101716/