I can however, point to evidence that it’s a popular business model, if you don’t mind accepting hacker news and y-combinator articles, as well as YouTube media of startup CEOs in earnings calls, but I refuse to defend it otherwise. These are often people with lots of money and advanced stem + business degrees however, so Im not going to sit here and act like I easily know better than them. I can say it did work for Google, but this is after they already were dominating with ad revenue and had the means to slowly introduce ads into every platform they owned ( youtube, maps, android). Popular platforms like DoorDash also have yet to become profitable, despite commanding a 70% market share on food delivery.