Hello. My friend's account has been blocked. tell me the reason for which it was blocked? and what can be done about this?

user name Top_100_Invest , https://bitcointalk.org/index.php?action=profile;u=1254405



he received a message

Sorry Top_100_Invest, you are banned from posting or sending personal messages on this forum.
You have been banned by a forum moderator. You may appeal here: banappeals-w6pquw43@theymos.e4ward.com .



 
help me please