LucasArts should be here on GOG and you should be the one to tell them that:
Attn: George Lucas, himself
P.O. Box 29908
San Francisco, CA 94129
Hey, awesome! Have other people mailed him about this? I'll write him a letter that clearly points out how he will only make more money by letting GoG sell his games. It's infallible logic! And it doesn't even take effort on his part!