cause for such termination , limitation of access or suspension shall include , but not be limited to , ( a ) breaches or violations of the tos or other incorporated agreements or guidelines , ( b ) requests by law enforcement or other government agencies , ( c ) discontinuance or material modification to the yahoo services ( or any part thereof ) , ( d ) unexpected technical or security issues or problems , ( e ) extended periods of inactivity , ( f ) engagement by you in fraudulent or illegal activities , and/or ( g ) nonpayment of any fees owed by you in connection with the yahoo services . 
