from what I understand from the FAQ, they do believe the sun is flat but the reason you can't tell is because it is moving in one direction as is Earth. This is gotta be the dumbest thing I have ever read on the internet, and that's saying a lot. There is so much evidence against this there is no reason to even argue with these people. Oh and please do yourself a favor and read their reason for the "Flat Earth Conspiracy."
"The motive is unknown although it is probably money."
It makes me think of the underpants gnomes from Southpark.
Step 1: Create a huge conspiracy to hide the fact that the Earth is flat.
Step 2: ........
Step 3: Profit