Interesting look at the incredible success of Pharmapacks, one of the top Amazon.com marketplace retailers, by the Inc. magazine. Thanks in no part to their development of proprietary algorithms, and a look at the general rise of companies selling through third-party marketplaces.

“How This Company Makes $70 Million Selling Random Stuff on Amazon”:

The next time you buy some humdrum product on Amazon, pause for a moment and check the Other Sellers listed on the right side of the page. That lip balm? Thirteen vendors offer it. Those vitamins? Twenty. As you click and shop, a battle rages in that little box, fought every day by entrepreneurs like Vagenas and Tramunti on practically every one of Amazon’s 410 million product pages.