This is a concern.
And no grace period or attempt to contact the admin before turing the service off?
CloudSearch (and all SaaS) must notify the admin if the billing credit card is expired -- better yet, notify the admin a week before renewal, advise admin to verify/change billing, etc...
This is how other SaaS do it. In fact, some are obnoxious about this -- and try to cross-sell into other services. But a simple, "Your CloudSearch service will renew at 12:00am GMT on March 15, 2014. Please verify your payment method as soon as possible to ensure uninterrupted service."
or something like that...
I expect this from an SaaS.
Thanks for bringing this up.