Coins from non-decorated houses?

So I was just making my way through my neighboring Springfields and accidentally clicked on a brown house that was NOT decorated. Other brown houses were (this is key), so it seems like this person just didn't manually change over the facade for this and a few other houses.

And guess what? It gave me a coin anyway! Tried again with another, and got another coin.

So it seems like as long as you have that type of house decorated in your town, individual ones that may not be decorated will still net you Santa coins.