If you show revenue, people will ask "How much?" And it will never be enough, but if you have no revenue, you can say you're pre-revenue. You're a potential pure play. It's not about how much you earn, it's about what you're worth. And who's worth the most? Companies that lose money.
Yes, we know it works. Just ask the knowledgeable crowd over on r/wallstreetbets. They have the answer: just turn your phone upside down! Voila, line is going up again!