Answer:
I am the same written forward backward and upside down.
I am a mother from a family of eight. Spins around all day despite my weight. Had a ninth sibling before founding out it's fake.
When set loose I fly away. Never so cursed as when I go astray.
I am a rock group with four members all of whom died in plane crashes. Who am I?
In my life I must bare, my bloodline I must share. What am I?
Whoever made me don't want me. Whoever bought me don't need me. Whoever use me don't know me.