(Time) is not under the users agreement when starting this game nor is it a concern for SE, if you dont have time then thats not a valid reason to place such rewards as you proposed. Ive seen many players that dont have enough time in the day an still manage to get into the top 100 if you want proof look to past seasons like 4 and 3 and. Also concerning the 100 per world would give less quality to the reward and people will just sit on their rank more.