[lotsofpulp]

>Isn't this the business model of tons of huge companies? Amazon famously ran at very deliberately low profits for years.

No. Operating at low profit margins is not the same as reaching $x of profit and then selling everything at cost.

>Uber and Lyft have margins so low they're losing tons of money in an attempt to get market share.

These do not seem relevant, as most businesses, by and large, year after year, are not giving away products or services to try and gain marketshare.