I Followed the Official AWS Amplify Guide and Was Charged $1,100

"Billing alerts" are a joke, give us hard spend limits. Then offer a way to set those limits during onboarding.

Building a business on blank cheques and accidental spends is shady. It's also a large barrier to adoption. The more times devs see reports like, "I tried [random 20-minute tutorial] and woke up to a bill for my life's savings and luckily support waived the fee this one time but next time they're coming for my house", the less they'll want to explore your offerings.

Spend limits are such an obvious and necessary feature that the only reason they don't have them is shady business practices.

Not really. Do you think that this is trivial at AWS scale? What do you do when people hit their hard spend limits, start shutting down their EC2 instances and deleting their data? I can see the argument that just because its "hard" doesn't mean they shouldn't do it, but it's disingenuous to say they're shady because they don't.