I think the only reason why 'no one' uses the official chat is because it's not displayed under community or multiplayer anymore.
Not everyone has Skype. Why not use the Facebook page to discuss? It's one of the most popular social networking sites around. Because Facebook is one of the most popular social networks around, more players are likely to have an account.
However, anyone who has a WL account can use the official chat and more WL players are likely to know about it.
Edit: WL chat can support pictures, you just need to upload them to an image hosting site and copy and paste the image link. Then, people will have to copy and paste the link into another tab/window in order to see the image.
Edit #2: Seems like the official chat is broken, but there are plans to make it work again.
Edited 2/3/2016 00:28:09
I made a warlight off topic chat: 2/3/2016 00:02:21