Im trying to post a service on the D2R forum. I went to sofrcore ladder trading, clicked "new trade", then clicked "new service", then added the title "free carry" with the following message.

"Level 80 summon necro that doesnt feel like grinding so I figured Id offer to help some people through normal. Im not the fastest and I might stop in 5 minutes or 5 hours. This carry is free, tipping is welcome but not required. If you wanna come along just reply to this and Ill DM you the game name. Im largely a casual player so dont expect greatness."

And when I hit "post new topic" I get a red message saying "Trading forum is for trading only". What am I doing wrong? There are several others posting carries in the same place. Do I have to charge people in order to post?

The word "free" is a part of the banned topic titles and descriptions: https://forums.d2jsp.org/info.php?p=7

If you want to offer a free service you may state so in your post content or say something along the lines of "free but tips appreciated".

Interesting. Ill change the title n give it a shot. Thanks for the info.