actual implementation is a tough job to almost all projects because you are battling with adoption. but this project has been in the market already. if there are already 10k+ active users that are using their sim card and the map of calls is authentic, then i guess this project will proceed and even if their ico is not successful, their platform will continue to be operational
but they should lower the current price of the sim card. $150 + $50 (intl shipping fee) is very expensive to most users, though you are giving it back via the load content but dont you think it is the reasonable price for this sim card?
I also think that $ 300 is a very large sum. Let's see how it all will work in practice. But there are already users who bought SIM cards.