By "us" you mean the ambassador and your team? I don't think you can put images on the signature section though. Why not go the usual way of linking your services on the signature space, including your social media etc, and then ask your ambassador to manage the threads?
I mean service.
The moderator from the other section sends me here. Is this one section is wrong for this task?
Do you mean someone that will create ANN thread for you guys and start discussion about your project? I can do this for you and this is the right section for posting this kind of topic.
FYI, creating multiple topic for the same project is not allowed here that's you need to have your own Announcement thread so that you can post all updates and discussion about your topic there.
You can contact me on telegram @cointrader034.