Ah, I've seen the updated tile and that was way better indeed, haha!
Typically people upload their images to an off site image host, my favorite is imgur.com . you can then use the link from there to embed an image in the forum.
Want to give some dough back to all those amazing pixel artists? Donations provide prize money for contests, help cover hosting costs and support new initiatives.
Good point. Will do that next time. Thanks !