That would make them give out lot of free spins to all the participants because the list is long and you only have few winners in eth and btc both and people will participate in hope of free wins only messing up the whole prediction I would say.

So this needs to be maintained in the same way and you have to make some analysis to make your prediction and see if your luck chance was hit or not and we have many different promotions by the team which you can check out and get some free spins.