How though did they sell this to the congregations?
Individual members of Congregations, I find, are not very bright. Upon asking one who their Kingdom Hall belongs to, I got the response, 'we all own it'. 'So you can legally sell YOUR share of it?'. Confused look.
Congregation members believe they are doing 'undercover' charity work that no one hears about (they don't like to boast you know...not letting left hand know what right foot is doing etc). I'd like to bet that not one of them is aware of their 'aims' as registered with the Charities Commission.