My nephew has a fast growing church (Bible believing Spirt filled), about three miles from JO ‘church’.
He told me about half their growth are families leaving that church looking for Biblical teaching.
If they want Biblical teaching they should start studying Rabbi Lapin’s stuff.
http://www.rabbidaniellapin.com/
It’ll give them a good foundational understanding for their faith.
Eventually, people get tired of milk and want meat. So I guess Osteen provides some service. He’s a milkman.