Not saying you should but we're told it's possible to land serverless app a '$40k/month bill using a 1,000-node botnet'

CompSci trio describe theoretical Denial-of-Wallet attack

If you want to stick it to a startup that relies on serverless infrastructure, you may be able to inflict $40,000 in financial damage every month with a modest 1,000-node botnet.…

from The Register