Slightly off topic...
At one point, Coca Cola was going to project their logo on the lunar surface using powerful lasers from earth. Obviously, such a project didn't get up and fell into the same category of radio telescopes on the dark side of the moon so they would not get interference from earth. lol.
Are we anticipating some "thing" will read them. Firstly, the messages in their millions or billions would not be in paper form. If they were, the shuttle or satellite would be so heavy, it probably wouldn't leave earths orbit. So, we've confirmed they are in digital format. Will the life form have the technology and correct format to read the media? On earth we struggle with DVD+R and DVD-R, I hope the life form have that sorted out. Finally do they understand english or perhaps the Japanese will tranlated them all Japanese before sending them on. Either way, will they be understood.
Food for thought.
I do think having your name floating around amongst space, dust, dark matter, etc. is pretty cool though.