It's made me stop and think a little about the vulnerability of the services you rely on to run your business. The situation could have been different and they could have been put out of action temporarily or permanently. It's all too easy to ignore the risk of services going down (for whatever reason) when you're doing your evaluations.
In this case I'd still use chargebee in a heartbeat but I do need to put something in place to snapshot all my billing data from their system on a regular basis (thankfully they make it very easy).
Horrible situation for those involved (my heart goes out to those who have lost loved ones) and I wish the region a speedy recovery.