Different Beer Mats

Why is it that beer mats have to be all the and boring? the answer is they don't, so it is beyong me why companies are not more creative with their beer mats.

A few examples off where creativity is explored within the beer mat.

Why use cardboard? Here are just a few examples of other materials that are on offer. 

Rubber re-usable beer mats. More practical and they are water resistant.