Of course that's not a good way of defining poverty. For all I know, somebody living in a low income area and shopping at Walmart could be a billionaire that lives frugal. But to Uber that doesn't actually matter: somebody who seems to spend little money on living expenses or travel won't spend a lot on Uber either, and likely wouldn't stay a customer if Uber inceased prices for him. In the end, spending is much more important in this context than actual wealth.