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.
Neither is what I want. I wish there was a provider with clear and documented limits to allow proper capacity planning while at the same time shifting all the availability risk to the customer but taking on the financial risk. I'd be willing to pay a higher fixed price for that, as long as it is not excessive.
Actually there is a third category, those who care. I will grant you it is a rare category but it is there.
One example name: Exoscale[1]
Swiss cloud provider, they offer:
(a) hard spend limits via account pre-pay balances (or you can also have post-pay if you want the "usual" cloud "surprises included" payment model).
(b) good customer service that doesn't hide behind "community forums"
No I am not an Exoscale shill, and no I don't work for Exoscale. I just know some of their happy customers. :)