Therefore, they've implemented hard-limits. So not offering hard-limits is a business decision, NOT a technical one. They're essentially hiding functionality they have.
Make of that as you will. Anyone justifying it, should be me with skepticism.
There is a free tier but that varies per service and anyway will not limit anything. It works as if it just gives you some credit to offset the costs.
[0] https://www.geeksforgeeks.org/cloud-computing/aws-educate-st...
They also offered (may still offer) the same thing with AWS Academy.
It's so much easier for them to have support wave accidental overuses.
'By the way old chap, you have gone over your storage limit. Do you want to buy more or delete some stuff?'
Why does my AWS counselor sound British. Am I in eu-west-2?