Hey, I took a quick look at your server and got to say it looked rather nice. But the way I found out about it is what I am writing here about. In your server there is a sign that says "no advertising". The server I am on has the same policy. If we find out about our players advertising our server on others, we actually ban them. We take it quiet seriously.
OliverTheBrave came onto my server and started advertising yours. Not impressed to be honest but as I personally know, this was probably not done by your direction.
I hope you take this seriously and at least have a word to him about it as I am sure you would not appreciate this happening on yours.
Good luck with it. All the best