You're literally talking about Bronze players who make max 50 DEC a day which is equivalent to $0.39 at current prices and call it 'free money'. That's still a 1 month ROI for most players.

If anything, the team should've banned bots the moment player numbers started multiplying instead of reducing rewards for Bronze.

I personally play in Gold, but I understand the new player frustration as they won't even be able to withdraw their Credits to 'cash out' since there's no way to utilize Credits except purchasing cards/potions/etc.