I used to play at low level but officially sanctioned Magic: The Gathering tournaments at a local shop, and there was no official policy for deciding who would play first, My understanding is that this is even the case at higher-level prize tournaments, and I think generally only high profile matches are live streamed (e.g. ones with well-known players or the final few rounds after most people are eliminated), and I read an article from a professional player a few years back about how sometimes people try to get away with things when the traditional "high roll" method is used (i.e. each player rolls their own die and the highest roll goes first, with repeats for ties), like bringing extremely large dice that essentially don't roll so much as just flop once, making it easy to toss in a way to force a given result. I'd also seen people use "evens and odds", where one person calls even or odd and the other rolls a die, with the choice of whether to go first going to the person who called if they were right and to the roller if not, but this still gives the person rolling some influence if they're unscrupulous. The article proposed that having one player call evens or odds but having _both_ players roll would eliminate any ability for cheating (assuming both players roll at once), since even being able to choose your result exactly would not be able to affect the chance of the sum being even or odd without knowing what your opponent would roll.