Sign of ... what?

Have you noticed a large number of convenience stores in your area displaying a large banner on the building?

The one I've seen a lot lately says, in bold red capital letters: "WE APPRECIATE YOUR BUSINESS."

The first time I saw one, I thought, "Well, I guess that's nice." Now, however, I see them everywhere and it indicates to me all of the owners were suckered by a sign maker into believing the banner would make them stand out.