No matter how much informal pressure is applied, if no hours are reported, JWs will take this as a signal to stop preaching. Just as they took the abolition of cover prices for the literature as a signal to stop paying for them. No amount of exhortations to voluntarily contribute to cover the cost of printing did the trick.
I think this is prescient. JWs are tired out after decades in the hamster wheel. ANY 'signal' from HQ that could otherwise be construed to diminish the 'ministry' will likely be seized upon.