There must be a process for unpaid bills, whatever that process is they could just enact it at the user's threshold instead of their own threshold. Ideally a soft limit that would disable networking and resource creation and then later a hard limit where your account is wiped out.
Because of the potential overhang before the billing system catches up I think it would be appropriate to lower the service quotas on this type of account. I'm not sure if the customer can lower their own quotas which would be an alternate cost control strategy but a beginner wouldn't know to think of that anyway. The solution with billing alerts is good at a company level but too much for a beginner in my opinion.
I know unexpected costs were a concern for me when I started using AWS as a student in 2008 and it is still a concern for people in the same situation, just with so much more complexity on top of it all. It will be a tiny fragment of their revenue but as time goes on a higher and higher level of expertise is required to get started, even though you can accomplish a lot with just the free tier. The amount of progress they've made on this issue in the last 13 years is just not impressive.
Because of the potential overhang before the billing system catches up I think it would be appropriate to lower the service quotas on this type of account. I'm not sure if the customer can lower their own quotas which would be an alternate cost control strategy but a beginner wouldn't know to think of that anyway. The solution with billing alerts is good at a company level but too much for a beginner in my opinion.
I know unexpected costs were a concern for me when I started using AWS as a student in 2008 and it is still a concern for people in the same situation, just with so much more complexity on top of it all. It will be a tiny fragment of their revenue but as time goes on a higher and higher level of expertise is required to get started, even though you can accomplish a lot with just the free tier. The amount of progress they've made on this issue in the last 13 years is just not impressive.