Bingo! Give the man a cigar!
You hit the nail on the head. That's probably the biggest reason I never listen to radio or TV preachers, because they aren't preachers, they are charlatans trying to milk you and me for every cent we got.
Remember that John Denver movie, "Oh God?" What did he call that TV preacher, "Reverend Blabber Mouth" was it? He was spot on!
Most TV / Randi preachers (large majority) are bad.
here are some that are not.
David Jeremiah
Chuck Swindoll
Billy Graham (now deceased)
John Macarthur