The timed refresh on the Secret Treasure is no longer working, at least for me -- the only refresh that has triggered for me this week was when I paid for one. Is this a new feature?
Based on the previous poster's "clairvoyance" comment, I imagine someone hasn't figured out the right use for tools yet (though an Art tool would be useful).
A strangely addictive game...
 "8 Ball Master"){kind=icon}
 "Cargo Bridge: Xmas level pack"){kind=icon}
 "Amazing Fix - the Veteran's House"){kind=icon}