You can choose that option, but they pay you via mail or ftp bank account (if you live in certain countries, not mine). But networks generally offer you more services , like getting paid through paypal, automated tags for videos, thumbnail editting (I dont use that anyway since I make my own) and access to a bunch of royalty free music to use. Some also differ on how much revenue you get paid though.
If any of you lovely people want some help getting a network partnership up and running please feel free to contact me, I have a couple of links I can give out that'll increase your odds of getting in with Fullscreen. Can't complain about them, they're one of the better networks.