Question about slipknot band members

Well i was watching a slipknot live movie and i saw about 3 dudes in the band, the only one i can reconize is the dude with the long nose but anyway 2 of them looked as if they where just running around the stage jumping up and down and crawling on stuff and the dude with the nose was beating on these 4 big ass drums while jacking his nose off. Lol what is the point of the 2 running around and the one beating on big ass drums you cant even here.

do u not see their getups?? its all a show man

Yes but if they ditched those 3 members then they would get three times as much money each