The list above is by no means exhaustive, but it does indicate the main point: a multi-vendor B2B marketplace is a much more complex affair under the hood than a B2C one. While it is definitely possible to run a B2C (or a B2X) marketplace on a B2B marketplace's back end, a reverse approach (that is, creating a B2B marketplace on a B2C one's back end) will certainly result in failure.
When creating a multi-vendor B2B marketplace, it is essential to select a B2B ecommerce platform specifically designed for such a task. Virto Commerce is one such platform, being tailored for B2B needs right from its inception and trusted by multiple enterprises around the world; be sure to check out the advantages and reserve a demo.
And stay tuned for future posts on the topic of multi-vendor B2B marketplaces!