One of Swedens biggest firms for building managing is called Locum. In the late nineties it was very cool for companies to have logos where their names were spelled in lower caps. So the logo was "locum". One Christmas Locum took out big ads in the biggest papers wishing everyone a merry Christmas and conveying the love that they felt for Sweden. How did they decide to do this? By replacing the "o" in locum with a heart of course.
So big ads that looked like this: "l ♥ c*m".