Yes. Not only are there bad actors, but oracle aggressively culls underutilized instances. If you sign up and attach your billing info you won’t get that happening to you. I know, it sounds silly, but once I did that I had no issues. It’s difficult to even get instances provisioned if you don’t do that, it’s really only possible by having a script that runs and continually retries/requests instances. I’ve had my billing info tied to it and never had an issue with being charged or having instances deprovisioned the entire half year I’ve been using it.