Founder here. Yeah, sorry about that. We totally intend to work with people without visas (it's actually where the idea started). We're just doing a phased launch. Talking to lots of people on the phone is hard to scale. We'll be removing the restriction as soon as we can.

EDIT People without visas are free to register now. They just can't book phone calls. We'll let everyone who registers know when they can book a call.