One of the hotfixes suggest doing a reroll after the fix rolls out. What is the cost of a re-roll? Like to know before risk it and lose everything gained allready.
If I'm understanding the weekly challenges interface correctly, there is no cost to reroll but you have a limited number of rerolls per week. I do not know what happens to progress if you have already started a challenge, but I strongly suspect that it's lost.
I'm fresh out of outrage, but I could muster up some amused annoyance if required.