The leaderboards have no good rewards, the best strategy (if you don't want to spend hours every day to stay at the top of the top league) seems to be to let yo

The leaderboards have no good rewards, the best strategy (if you don't want to spend hours every day to stay at the top of the top league) seems to be to let your rank slip into the lowest league and then to win each week until you get back to the highest league, because there is no reward for staying in the middle of a high-ish league. Also the new daily quests seem to scale requirements with your engagement, but not scale the rewards. So I have checked out of the unrewarding hamsterwheel and just do one or two lessons in the evening. It is, however, one of the few places that is showing me ads so I guess it's working anyway.