This is due to the way cloud is monetized being different than the costs of the underlying resources. The asymmetry of the cost for attackers requesting a file

This is due to the way cloud is monetized being different than the costs of the underlying resources. The asymmetry of the cost for attackers requesting a file being $0 and the cloud being per request and byte transfered makes it easy to rack up large bills for little cost from attackers. With proper competition it would also be cheap to serve such requests, but cloud providers are a rip off.