It's a marketplace that also handles the global shipping, warehousing, and delivery of goods on behalf of the sellers. It's a low-margin business that puts a lipstick on the pig that is a bunch of incumbents in the manufacturing and global shipping industries. I do not approve of how they got rid of employees, but I do not envy them. Their partners love mainframes, MS-DOS apps, and faxes. It's hard to work with them.
I don't know if they do this for all of their products, but one bed frame that I purchased from them turned out to be a bed frame you could buy on Amazon for half the cost, just under a more upscale name.
(That bed frame lasted two years. I replaced it with a Thuma. Incredible product.)