I had this debate before. Amazon has proven that a profitless growth model is viable.
Apple had the profit edge in the PC battle, too, and we all know how that turned out. Eventually, adoption becomes King.
Profitless growth is an oxymoron. What passes for it is profit reinvested in low margins to induce growth. Otherwise it is a Ponzi scheme. And, I would add, it turns into a Ponzi scheme if there is a downturn in the market at the wrong time.