I don't have the information to tell you whose idea this originally was. I've had the punched motif in a file for a long time.
The Thank You card is a case of cmsuto . I put this one in my favorite file this past week. I have had the Beautiful Border set and I think this card is perfect with it.
For a simple card there is a lot of detail in the paper piercing and the embossing. The sentiment in this case makes it a Thank You card, but it can be anything according to what sentiment you choose.