Simple. No one is interested in speniding the money on a known outcome of a null. Senseless.
The oines published have been with the doubting Thomasas who dare to show up on testing day. Many back out and chicken out of fear.
Why don't you set one up? After all, you seem to be making all sorts of claims for audibility, yet not a single cited reference to support any of the claims. Oh, references thaz stand up.