Why did I get a 3 day ban for Skype Impostering?

Hi, I do not really care that much since this is a mistake and it will only last 3 days. But I would like to know if I did anything on my account that looked suspicious? I just put out a few posts asking to buy yugioh cards and added and talked to a few people on skype. One guy was very suspicious and had a new account that PMed asking for skype. Anyways I think that is off topic. Just tell me what happened please. Thanks. My accounts name is Zomborz, idk why it says already in use.

 

You made impostor skypes whilst trying to dupe a user that was currently in an MM with myself.

Your account pmed him and proof of this was shown connecting you to the skype attempting to scam.

Denied.