Both. I make arguments to sway attitudes and opinions.Is the point of all this just to argue or is it to try and sway people's attitudes and/or opinions?
But that's only part of the point of all of this. I already provided a list of reasons for unbelievers to be here. Do you need to see it again?
REASONS FOR UNBELIEVERS TO POST ON TOPIX ATHEIST THREADS
 Learn from one another. This is atheist school, and we have many gifted atheist posters here.
 Sway any possible uncommitted lurkers or future readers.
 Practice formulating better and more cogent arguments.
 Practice writing skills.
 Tap the aquarium glass. Learn by observing the ecosystem of theists that parade through a thread.
 Fellowship with other atheists. There havent been too many venues for this in the past.
 Entertainment - it's fun.
 It's the right thing to do.