Slim,
Where are you getting your figures? I pulled the SDA annual report and they took in 3.4b (I'll just US dollars since that's what they reported). They have 20m members who tithe. Dividing that gets to $170 not 200-300. Using that number as an average JW contribution gets you to 1.35ish billion NOT 2b. But, I would argue that 1.3b number is what they wish they were getting from contributions. You cite the UK contributions since they have to disclose that. But you are trying to use contributions from one of the weathliest countries with a large JW presence and say that's the worldwide average. That doesn't make ANY sense! 2b annual income is not in any way a "reasonable estimate". If you want to use something, maybe half of the UK contributions is a reasonable worldwide average. Mayb 2/3rds? No clue but I know using the UK contributions is not a good estimate.
This is what drives me nuts about your collapse discussions. You try to make economic arguements without any sound economic basis. It's like the WT arguing against science!
We know the WT doesn't have a tithing system and their main source of income in the past was selling books and mags to JWs who in turn tried to recoup some of that money by selling to the public. Obviously, that's put a major dent in the income coming in. We know they are selling assets and downsizing. Even on the local level with the KHs. That's not a sign of an organization that is in rapid expansion mode. No one is saying that can't collapse nor is anyone here saying that they are doing great. But, you take such leaps in logic that now they are collapsing. No, last year they grew. Not by much, but growth is not collapse. Will they die one day? Sure, everything does. Is it by the end of the year? I'll wage my life savings the answer is no.