If a person wanted to sell his stamp business, and/or wanted to get more for it than it is worth, they would want to pump up the sales. They would calculate how much each transaction they would have to pay
eBay and consider this a cost of increasing the likelihood of selling the business at a much higher price. They might even make listings and 'sales' to fall just short of the
eBay jump in cost percentage.
They would make a bunch of
eBay accounts, start selling to themselves, controlling each 'sale'. Within a short period of time, they would have a 'profitable' business with plenty of 'sales', plenty of followers, low cost of customer acquisition, and high margins. this could easily make an unsaleable business saleable or greatly increase the sale value of a business.
Making good money is not always about having a business, it often is more about selling a business.
Don