Just 2 simple ones. Noticed that this forum does not have a service subforum under marketplace. From what I see services threads tend to get lost under the buying/sale of items. Also, I kind of wondered why the forum rules are under support and I had to use the search function to find it. Perhaps it should be at a more visible place preferably under the same section as the in-game rules. Yes, I know it's in the game T&C but it's just 1 line in the whole thread and it's pretty much really easy to miss. Tl;dr reduces clutter in marketplace and the need to bump up your thread. Forum rules more visible and basically easier access for newer players who don't want to break rules unknowingly. Just some thought.
I think the idea of adding a service category is a great idea! As for the T&C suggestion, I guess I can see your point. To be honest, I didn't know the link existed on the main forum page for a while, probably because I rarely used the support subforums for myself. It would stand out more if it was given a different icon and bolded in my opinion, but it varies based on personal taste.