The Arid Ruins challenge consists of 5 battles that you play at real time with other human player (randomly), in escalating difficulty level. As long as you won at least one battle, you will get a prize. (2 chests for free, then you can open more, 300 gems each.)
So far so good, and I expected the prize quality in the chests to change according to amount of battles won, but that's not the case.
After playing it daily, I can say for certain: it doesn't matter if I win one battle or four battles (to be honest never got to win all five), the prizes are the same.
I've seen lots of players quit after winning the first, probably knowing there's no point wasting time on the other battles, and consider doing it myself too, but thought to ask first: is there any other point winning more than one battle? Is this recorded anywhere?