What platform is for large brands and requires an invite to join?

Amazon Vendor Central is the platform used by manufacturers and distributors to sell their products directly to Amazon, which then resells them to customers. It operates on an invite-only basis and is typically reserved for larger brands with established supply chains and significant sales volume. This model makes Amazon the retailer, purchasing wholesale from the vendor. Amazon Seller Central is for third-party sellers who sell directly to customers on the Amazon marketplace. Amazon Brand Registry helps brand owners protect their intellectual property and control their listings on Amazon, but it's not a selling platform itself. Merch by Amazon is for designers to sell custom apparel and products. Kindle Direct Publishing is for authors to self-publish ebooks and paperbacks.