When not fending off rabid Mavericks or the likes of Sigma, X makes a humble living advertising real estate:
This curious, albeit unofficial use of X's image was spotted by Nuevos Jeugo Retro at an undisclosed urban location. Translated as "Mega Available", the billboard is apparently advertising vacant property within the area, likely the very building it adorns.
The billboard is a popular attraction among Spanish-speaking MM fans, with pictures dating back to September of 2010. Wherever it is, the sign is pretty new and likely still hanging.
You can check out a few more photos of this odd sighting at Nuevos Jeugo Retro.