Good question. If you are willing to sign the form where essentially you could be working for free based upon what you have written, most likely the signing requires you and others to be paid minimum wage under California law.I suggest that you take the form presented you to a labor attorney or your local department of labor for review. It is one thing to be on a commission sales basis. It is another matter to actually do work and not get paid for it that are not sales related for the commissions.