What is this all about?

[Centumaught]

The message says “for free”. Does not even mention crowns… misleading much?

centumaught The PowerUps

 

[ElonMusk]

Maybe one of your buildings have less than 5 minutes left, and you can finish them for free?

 

[Centumaught]

It was not that, but good thought.
CS refunded all the crowns I lost and by now I imagine they have fixed the misleading message.

 

[King Crimson]

Did you have a 'free' option - as @ElonMusk said - but when you tapped the 'YES' another building costing crowns was finished? Had that happen to me - sneaky little dev(il)s ...