[Update]
A new Arena season has been announced, and it will bring an updated reward system.
Dev Comment: After listening to player feedback, we’ve updated the rewards for Underground Arena, with a focus on making it easier to earn back your entry costs through deep runs. By further streamlining the reward structure and reallocating some of the Crowd’s Favor, we were able to provide better gold and ticket payouts, bringing back more of that “infinite run” feeling that’s been a hallmark of the classic Arena experience. We’ll be monitoring how things play out and will continue to adjust as needed.
Please read the full update here (towards the bottom of the article).