On April 4, 2007 Roblox announced that they would be hosting a contest called the Roblox Billboard Contest in a blog post.. The prize would be access to the then top-secret feature Builder's Club.
Users had to use an image editing software to make a billboard. The images had to be saved in a 256 x 128 pixel image file. Afterwards it had to be submitted to email@example.com
The winners were announced in a blog post on April 11, 2007.