Actually the biggest key is a distinction between profitability and cash flow. Amazon has been cash flow positive since 2001. Sure, it spent huge number of years burning cash building it's revenue from $2 billion in 2001 to $200 billion today, but because they have a structure where they don't have to pay their suppliers until close to 3-4 months after the collect from their customers, they can sustain that without needing to raise outside cash.
That's a huge distinction, if you start having to raise more debt or equity in order to fund your growth it's going to negatively impact the long term free cash flow per share of your business and will make it harder for your to generate outsized returns.
That's a huge distinction, if you start having to raise more debt or equity in order to fund your growth it's going to negatively impact the long term free cash flow per share of your business and will make it harder for your to generate outsized returns.