Just off the top of my head, it would seem that they have a very narrow band of potential customers (cost aside): people who are (a) crazy enough to think this would work, but (b) not crazy enough to think that you don't need a radio to talk to aliens: just talk, and they'll hear you. How many people is that?
There have been reassuring noises from Senators McCain and Feingold about FEC Commissioner Brad Smith's alarm about regulation of political speech on the Internet. (I previously talked about this issue here and here.) Notably Ellen Weintraub of the FEC has written an article telling allegedly panicky bloggers to chill out.
Reassured? Not so fast, bunkie. Jim Geraghty of the TKS blog at National Review Online hosts a devastating takedown of Weintraub's article from Marshall Manson of the Center for Individual Freedom.