The reason you multibox, is just for fun to be fair! i can't give you another explination. And as far as how multiboxing works its a long story, but you can basicly say that you play the game pretty much as everyone ells, but you have 4 accounts, you have your main window ``game`` that you play on, and everything you do is copyed to the other windows. but its not just to play like normal, for example my boxes are on follow, and if i engage in a fight they lose follow, which means i got a set keybind so all of them starts following me agin, but any time i use a skill they stop agin. the reason its harder in this game is cuz we do not have addons for example. so you can't use things like strobe ``Auto follow`` and if you want to click something lets say like an elevator or an keypad, you have to tab over to every character and click it. as far as Flash points goes, you can't do flash points, its not manageable unless u do the really easy once. so as i said Multiboxing is for fun, i have been multiboxing for the past 9 years in diffrent games.
Ooh yeah... if you want to know more and want to see some propper videos, the tool i am useing for Multiboxing is isboxer.