When I started the tournament I was also really interested in 1-day returns and thought they gave a good idea of how well I was doing. But I’d recommend having a read of this post:
TLDR is that your 1-day returns don’t actually really mean anything useful. As your predicting 4 weeks into the future, so your correlations intra-round don’t really mean anything, and hence neither do your 1-day returns.
You should be getting a round summary email at the end of each resolved round, which tells you the percentage return you would have got that round if you had been staking. That’s really the incentive your describing. Trying to incentivise with intra-round performance would be a bit misleading.
We just need to have new users to have patience 
Having said it would be good if we could tell them somewhere to have patience for this first email, as this isn’t explained in the documentation, you only find out after 4 weeks when you get your first email