I'm familiar with Incoterms and international logistics and distribution but I am not sure about your point is linking Incoterms and distribution model.We're talking about E-commerce. No shelf. Canon USA does not sell it's prosumer cameras, lenses, or Cine equipment via a "Distributor". Buyer, Seller, Shipping, Warehouse management. For e-commerce. (preorders and first come first serve selling e-commerce is NOT brick and mortar). Period. it is precisely how automated inventory (WMS) and warehousing (ASRS) works in large vendor warehousing. With Incoterms rules being the standard for shipping and delivery, NOT the old "brick and mortar" chain methodoloy that you are familiar and refering to. Consumer purchases directly from the warehouse inventory via online e-commerce. Automated warehousing (WMS) has become a staple for mass inventory in North America. The seller may or not be responsible for the purchaser's "Distributor" beyond the point of deliver determined by the Incoterm coding. The number purchased and WMS has nada to do with the shipping/distribution. Warehousing and Inventory management are the growth drivers of e-commerce.
A familiarization with the Incoterms rules may help you differentiate before assuming incorrectly any similarity.
ICC’s world renowned Incoterms© rules facilitate trillions of dollars in global trade each year. Learn more about the official launch of Incoterms® 2020.iccwbo.org
Incoterms don't care about which model is used. They only define shipping costs and risk/insurance between buyer and seller with IoR and EoR in different scenarios. They specifically do not cover transfer of title ie who owns the item or holds a lien on the item at any point in time or whether the item is on consignment with the seller.
Incoterms are generally not used for domestic shipping within the US in any case but of course can be. The common use of FOB within the US is incorrect except in very specific circumstances not related to shipping cameras
WMS and ASRS can be used for different distribution models from centralised warehouse per country or hub/spoke/edge stocking points or even build to order. Forecast models for inventory management can be from a simple reorder point system to AI based.
E-commerce just means buying online whether B2B or C2B and independent of stocking models.
Minimising inventory is cheaper for everyone but there is always a risk the just-in-time manufacturing will break down due to political, disaster, Covid, shipping (Evergreen's Ever Given) or bottlenecks (eg global semiconductor fab constraints) or a combination of these