Non-mining-related nodes don't matter.   Transactions will reach mining nodes/pools.  Non-mining nodes are only interesting for its owner, to see the block chain for himself, and verify its validity without having to trust another full node.  But full nodes that do not relate to mining don't matter in the consensus mechanism.

Everybody can fire up 100 000 nodes on amazon if he/she wants to.

What does matter, are users.  They 'vote with their money' and determine market cap.