For example, run an ad campaign on Google, figure out your CPC (cost per customer). See if that is even below your LTV (lifetime value per customer) plus operating expenses. And then tweak all the variables in your product and campaign to actually create some sort of sustainable business flywheel.
Having an amazing product and 'waiting' for your network to spread the word to all potential customers.. it's absurd to think that would work. It's hard enough even with big ad campaigns to reach potential customers.