I wouldn't expect a promoter to tell you how many tickets they sold on the door, how much they paid their acts, not unless they particularly wanted or needed to. These sort of things are usually kept under wraps. Try, for example, to find out how much comedians get paid for TV appearances. Nobody usually lets that out so as not to jeapordise future negotiations. Likewise if a show is struggling it's often wise to put on a brave face and hope things will turn around, rather than say to everyone we only sold 6 tickets yesterday ergo you may conclude we're probably not very good.
I dunno, just brainstorming the pros and cons of sharing your earnings. I've gone in both directions in the past, 'fessed all and kept schtum. Personally I'd love Dec & Si to share because, as I say, it could be a good business model to follow. If they got less than 30 entries, then it would just be embarrassing (but we can assume, from the earlier "want to know how many entries we got then?" posting, that's not the case). I, like you, am on tenterhooks.