Answer:
The more there is the less you see.
Whoever made me don't want me. Whoever bought me don't need me. Whoever use me don't know me.
I will disappear every time you say my name. What am I?
Digital white-out.
Kings and queens may cling to power and the jesters may have their call. I am the most common but I can rule them all. What am I?
Though not a plant, has leaves. Though not a beast, has spine. Though many wouldn't need this thing, It's more valuable than wine.