From our Devs on Twitter:

Blair Brown: Agents! Victory chests are now being handed out in the store. Also, I heard that treasure rooms have an abundance of crafting mats..

Billy Buskell: Agents, there was an incident with ZITHER!'s wardrobe. Chests of materials may appear in treasure rooms. We must clean up by Friday morning.
Billy Buskell: To clarify, we've added a chance to earn materials in treasure rooms, with higher chance of cloth, from now until Friday morning #DAIMP :-D

Blair Brown: Remember, all this week, crafting mats are dropping in the treasure room chests !!

Also, incoming fix for prestige points.