I dunno, the largest accidental AWS overages I’ve triaged in my career (at very different companies) were all storage. Dangling EBS, forgotten S3 accumulating data after a deletion cron broke, incompletely retention-policy’d CloudWatch buckets, Aurora snapshots…the list is pretty long.

“Large” is relative to the business of course, but the biggest storage-related overages I’ve personally triaged are in the high $100ks to low $millions per month. Colleagues have heard of orders of magnitude more costly.

That’s not storage costs, that’s activity adding to storage used. The question is whether it would be cheap enough for them to keep all your existing data frozen until you paid the bill.