Watchtower is a printing corporation trying to find a new path in a world where printing is dying. Regardless of how many members they have who are seriously contributing, they are suffering monetarily. Add the lawsuits in, the untold settlements- who knows how much trouble they are in?
You are certainly probably right about people just being around so they don't get shunned. And when they took the money from the congregations and started saying how they needed MORE MORE MORE, they profoundly changed many of those members. They still give, but most of them are not giving MORE MORE MORE. They deep down know that Mother took the money, Mother doesn't really need 25 bucks a head at the convention (or whatever).