“…It is hence interesting to observe that a number of competitive implementations attempted to shift the focus of the competition from a competition between users to one between ideas [8,9,20,64,69], often employing leaderboards of ideas instead of or next to leaderboards of users. [2,7,8,9,16,28,31,41,55,64,73,76,78,79,80,81,83,86] 18 All [4,7,12,16,20,22,24,28,31,36,41,48,52,54,64,68,73,74,76,77,78,79,81,83] 24…”