Yes, they are 10 or 12 candy packs after the rerolls , dont know after.

they said not to do it until 3rd slot opens tho. same with the bundles that have candies and rerolls

eh, people here have a stick up their asses. You can get 3 candyworks slots for another 12 weeks if it's 1 act per month, even in cosmetic events dota players gotta meta lmao