I am sorry for your loss. Make sure to change all passwords and change wallets, they maybe targeted something else too.
Well, I hope my suggestion on this thread helped Stake to implement this email code idea for tipping and that it will help to prevent incidents like this in the future.
I know this will not help you now, because you already lost $60 000 .... but it is a step in the right direction to help others not to lose money through the tipping service.