Ease of payment processing alone might be worth setting up a US corporation. In a lot of countries where Stripe et al. are not available, PayPal (shudder!) is

Ease of payment processing alone might be worth setting up a US corporation. In a lot of countries where Stripe et al. are not available, PayPal (shudder!) is the only way to collect payment from customers all over the world, and even PayPal isn't available all the time. For example, in my country of citizenship, I can use PayPal to collect payment from foreigners but not from people in the same country, so I would be forced to maintain two payment processing systems (a domestic-only gateway as well as PayPal for the rest of the world) and add a lot of friction to the sign-up process if I incorporated there.