Tournaments/LAN Events determined their own rules, most big competitions in the top tier scene are sponsored and have their own kit, this makes for a level playing field of all other obvious benefits, otherwise is stated BYOC (Bring your own computer) for lower tier events such as Multiply and Dreamhack and the like. read more
As a tournament organizer myself (mostly for Dota 2), players are indeed allowed to use their own set up with the o my exception being headsets. They would have to use our noise cancelling headsets while putting theirs around their neck if they need to promote their sponsors. read more
Originally answered on May 13th, 2015 . This question originally appeared on Quora : The best answer to any question. Ask a question, get a great answer. Learn from experts and access insider knowledge. You can follow Quora on Twitter , Facebook , and Google+ . read more