alt Hacker NewsFor S3 a reasonable option is a data limit as the primary limit. If you set it a TB over your real needs you only waste one dollar per day after it locks. And there's no need for any other paused service to charge more than that for idle data.
You're right that nobody wants deletion. Spending limits do not imply deletion.
I think a more sensible default is S3/etc locking access to data for 30 days, maybe even as little as 7 days, while you're able to still list and DELETE said data as you wish, without being able to get or put.