I'm not sure if it's the same for all cities but for the screening in LA, they're not giving out a certain number of passes. The instructions tell you to print out a webpage "pass" and then go wait in line, but the pass does not guarantee entry. It's basically first come, first serve. Still a good deal at being free, but if you can't get there early to wait in line it may be a waste of time. Just wanted to give the heads up.