How do you get mln background skins

So far there are only 3.
Bionicle, city, and Lego Universe.

• For Bionicle, trade Atakus for 10 Thornax
• For Lego city, trade Mayor Frictionfit for 10 Clippings
• For Lego Universe, play Friendly Felix's Concert Module. There is a 12% of winning the skin.

I'm on MLN too! I am Nathan6342