You can make outbound calls internationally but it's very expensive to call a mobile outside of US/Canada. How many of their customers could afford to run thei

You can make outbound calls internationally but it's very expensive to call a mobile outside of US/Canada. How many of their customers could afford to run their service when it costs so much to make a mobile phone call internationally (i.e. $0.32 - $0.493 for the UK)? Compare that to $0.02 for US/Canada.