It doesn't. Your unit is tiny. A few thousand users doesn't even break the threshold of "death by Hacker News". Uber's 93 million in 80 countries means that (v

It doesn't. Your unit is tiny. A few thousand users doesn't even break the threshold of "death by Hacker News". Uber's 93 million in 80 countries means that (very roughly) in each country they have three orders of magnitude more users than you: 93 mln/80 countries = 1+ mln in each country = 1000 times more than you = 3 orders of magnitude. As I said, just dealing with payments in each country is often a full-time job for a dedicated tema even if you process payments through a third party like Adyen. Are Uber operating at 100% efficiency? Hell no. Will you have several orders of magnitudes fewer people than Uber when you grow to Uber's size? I very highly doubt it. Of course, there are exceptions like WhatsApp, but WhatsApp in itself is a very simple product (that is very hard to scale), and was (and still is) very slow in rolling out features.