Seeing Lew being the only celebrity mouthpiece weighing in on this just seems to confirm my hunch that the Lew Rockwell wing is feeling sad that they're not being invited to cash in on the C4L, and he wants to use the Ron Paul site to essentially revive the newsletters for a new generation.
I think, although I will never be able to prove it, and this is of course sheer speculation, it also indicates that Lew is probably accessing Ron Paul's Twitter, and that he probably wrote the Kyle tweet specifically to appeal to the radical libertarians - his personal cash cow.