I feel really sorry for the kid. His mom's mind seemed to jump to the financial implications quickly. She's worried he's been brainwashed by this controversial church and they want his money. A valid concern, but the big one would be the BRAINWASHING part. You can live without the money, but a mind is a terrible thing to waste.
I don't think this church has his best interests at heart, because they basically threw him to the wolves for their own purposes (whether that was money or promoting their ministry).
Which is sad, because it's a great thing when you find a church (or other religious institution) where the congregation looks out for you and your family.