“…However, the authors investigated this only in the short-term and indicated that financial rewards in comparison to gamification may reduce the participation in the long-term. [28], [30], [35], [36], [40], [41], [43], [44], [45], [47], [48], [49], [52], [53], [55] [3], [27], [33], [36], [44], [52] [9], [10], [16], [22], [30], [41], [42], [46], [47] [23], [35] 1 , [40], [53], [55] [45], [49] 22 leaderboards/ rankings [3], [27], [28], [33], [36], [52] [4], [9], [10], [16], [22], [42], [46], [47] [23], [35], [40], …”