What's the use of Culture versus AIs?
I'm on my third game ... so ok, the AI is not that great, but soon I'll probably be playing vs. multiple AIs. Anyway,
To me, the best defense is a good offense. Which is to say, I'm usually expanding pretty fast. With this kind of playing, it seems to me like the only use of Media/Broadcast buildings is that they slightly delay me from taking neutralized planets.
If Sins had more of a "dug in" feel to it, like say Civ 4, I can see Culture being more important. But for me, it's just an annoyance ... It's so fluid that one can simply grab a planet much easier than waiting to Culture it.
Now, if only my Media/Broadcast helped ME by increasing Allegiance when no one else was influencing me (which is how it usually is), then it'd be great. But they don't, AFAIK.
Honestly, I haven't played with Media/Broadcast much. Am I missing the point?