I was very turned off by the "target" population method that aimed music and sermons to attract them.
The sermons became pabulum neither hot not cold.
It is a method that relies on man to build a church not God.
I give on your question ?? I sure would love the answer :)
The answer is 0.
Even the apostle Paul, arguably the most talented and educated person speaking for God in the Scriptures, counted all that as nothing... and he certainly didn't use 'studied ambiguity' techniques to sweet talk people into the kingdom.
THerefore I shall spewwww thee out of my mouth!
Your post reminded me of one of the Wisdoms of Hank Hill from the King of the Hill television program. I can't remember exactly how it went but it was something like "I don't believe in Jesus Rock. It don't make me love Jesus any better, but it sure makes me love Rock & Roll less."
Or something like that.