Today if the credit card(s) on the account expire but the "contact on file" is (for instance) an old email address, or a customer that doesn't understand its implications, or to a corporate email that isn't checked often, then after 15 days it appears that all droplets *and their backups* are destroyed.
This causes bad experiences (and bad press), and fear for people evaluating DO.
Suggestion: since destroying droplets will 'send a guaranteed message' to vital parties ("why is my website not up? better contact somebody to fix it..."), I suggest that when accounts are suspended, perhaps power down the droplets and "take a snapshot", and keep the snapshot+backups" (for "a week" or "a month"?) so responsible parties can be alerted, and get back up to business with minimal delay, vs. the potential for catastrophic delay since even the backups are automated-ly destroyed today. (see that link). Cheers!