The demo is back up and running. It seems Google ended what they are calling a “free period” though I like everyone else had already enabled billing on our key.
All I needed to do was visit my Google console and click the “upgrade account” button they are presenting at the top of the page in the console.
I have not had time to look at the finer details yet.
One thing to note.
Inside of Rapidweaver your maps use our key and only start using yours on the live published page. So as our key has been down, this would have showed as an issue for everyone inside of Rapidweaver.