And don't forget Amazon. They aren't venture backed but they have access to capital at cheaper rates than most countries due to their position as a stock market darling. They use ultra-cheap money and a willingness to run negative margins which they refer to "reinvesting in the business" to bleed competitors dry. Few other companies on the planet have the ability to run negative or break-even margins the way Amazon does.

Diapers.com example: "When Bezos’s lieutenants learned of Wal-Mart’s counterbid, they ratcheted up the pressure, telling the Quidsi founders that [Bezos] was such a furious competitor that he would drive diaper prices to zero if they sold to Bentonville. The Quidsi board convened to discuss the possibility of letting the Amazon deal expire and then resuming negotiations with Wal-Mart. But by then, Bezos’s Khrushchev-like willingness to use the thermonuclear option had had its intended effect. The Quidsi executives stuck with Amazon, largely out of fear. The deal was announced Nov. 8, 2010."

https://slate.com/technology/2013/10/amazon-book-how-jeff-be...