Ask HN: Did anybody else experience a weird spike in AWS charges in Jan?

We usually spend about $200.00 / month with AWS, as we bring servers up and down for R&D purposes. For January, the charge surged to over $1,100.00 for no apparent reason. Strangely, the AWS support portal has a banner up saying "we are experiencing a high volume of account and billing requests right now". Which leads me to wonder if something happened on the Amazon end which resulted in a lot of people getting weird charges in Jan. So now I'm curious if any other HN'ers can confirm any kind of similar experience.