even if you wanna make money its still better to keep it open source competition is more beneficial to games then companies will admit, it attracts alot of attention and helps build a fanbase i can see why devcat,kog,or any mmo company would be mad at people for making money off of their work however they would be doing alot better if they worked with private servers let them exist as long as they.
1. get updates 3 months later then the local official server
2. give 20% of their earnings to the local official server
by doing this it would be a win win for everyone