Not being revealed is entirely different than being hiden, I think for certain organizations you can chose to not show it. Usually there is a % that you have to stay within. Not even sure if there still is the rehydrate limit or not, I know everyone does have to step on a scale again, but it's not official because the other opponents team isn't present
presumably there'll be some cruisers cutting big weight to make 200 and rehydrating 30lbs +, which is 15% of body weight. Broner must of being cutting a fair amount to make SFW, chavez jr always looks bigger in the main than his opponents too. Beterbiev looks huge for a LHW too though don't know how much he's cutting to make 175.