потому, что
"Masato only receives messages from contacts on his contact list or from contacts that have registered their phone number. In order to send Masato a message, please register your phone number to ICQ, or add Masato to your contact list, and once Masato adds you to his contact list you can send Masato messages"

Ибо он дурак и это хроническое т.т

Предлагаю ему устроить кару