You have essentially laid out the tech company playbook. In so many cases, hyper-growth is subsidized by investors (or another part of a giant business). The product is offered to the public at FAR below cost in order to gain a monopoly-like market share. After they have successfully killed all viable competitors, they ratchet up prices (and/or ad-delivery), decrease spend on customer service, etc. and rake in profits. This is why the “growth mindset” is so ingrained in SV tech culture.