@alclark that incident is unrelated to mine.
I got a response from support:
Your projects had been flagged by our abuse detection system
After a manual review of your project, I do not believe there is any abusive activity, and that the block was placed in error. I have removed the block for your user and projects, and I apologize for any inconvenience this has caused.
The only thing I remember doing was executing cat ~/.aws/credentials file to test if the aws credentials were valid.