I have no idea how I end up with this kind of billing where most of my instances are stuck or in cold status.
Hm… It looks like RAM is by far the largest contribution. Maybe some of the stuck sprites are using gigabytes of memory? (That might be why they’re stuck, actually, 
.)
You can email billing@fly.io to get more details (and possibly a partial refund, if it really was the stuck Sprites at fault).
https://fly.io/docs/about/support/#billing-and-account-support
Yeah anyway. I tolerated the stuck sprites because well it’s cheap no. Well it’s not anymore so I am cancelling this service. Good luck folks.