Micon lived in Nevada when he was arrested. I don't know where Stunna is residing. but if in the U.S. one could understand his move to exclude U.S. customers.
which other countries are not allowed?
Rumours are that Stunna is from Australia ( I could be wrong ) and its not about residing in US or not because this is more like PrimeDice protecting itself from any issue that might happen in the future .
Moreover perhaps Stunna is concern about what if the US charged him from accepting a deposit from the US players, so that could be why this precautions is taken
The others countries are not mentioned, perhaps it is safe to say that all countries in which online gambling is illegal