As somebody who deals with AWS professionally on a daily basis, I will 100% admit that it can be confusing for people to figure out pricing and scale. I have to talk with engineers every week about design decisions and their cost impacts, and the implications of the things they want to run, and it's clear that AWS doesn't give enough guidance in the UI or documentation structured in a way that a layperson could find what they're looking for quickly and easily for that information.

That said? This article rubs me the wrong way. The suggestion that this problem is caused by "dark patterns" and Amazon being misleading about "pay as you go" screams FUD to me. The screenshots provided right in the article clearly show that what was being done wasn't eligible for free tier. And not understanding that launching a resource, regardless of whether or not you're interacting with it, is consuming the service which launches the resource is a problem with the user, not the marketing. Yes, the author admits that they didn't scrutinize, but that doesn't excuse the position of the article that AWS is somehow doing this to intentionally bilk people.