No. It's very likely. Not every company is run like a FAANG company with everything under a microscope. At your average company, it's extremely common for individual teams to just have their own cloud service accounts for internal team use, not as tightly controlled as a company's production cloud services account. I'd argue most of them are very loosely managed by a single person, letting said person do pretty much whatever they want.

And if those accounts have thousands of dollars in AWS credit or something, this could run under the radar for up to 6 months uninterrupted, depending on when the credits expire. Most credits are handed out for free from the cloud service provider with no cost auditing or anything of the like.

I'm in a position where I could do this myself at work with very low risk of getting caught. I just have no interest in doing so, and I'd rather not be fired if I did get caught. But it's definitely possible.