Answer:
I get paid when I drive away my customers. What am I?
I have six faces but not even one body connected 21 eyes in total but cannot see.
You throw me away, I find my way back. Traditionally, I'm wooden with an arch in my back. What am I?
I hide in a dark tunnel awaiting my time. I can only be released by pulling back. Once released I may do unstoppable damage.
The more you take, the more you leave behind. What are they?
Whoever made me don't want me. Whoever bought me don't need me. Whoever use me don't know me.