My Experience;
Tried to get involved with local extended warranty firm to cover towing for their clients, best they would offer was to include my details in their warranty booklet, for an annual fee of $200. When I asked how many policies sell and claims are settled per annum, they answered 750 policies and 11 claims for the previous 12 months.
The first $200 you pay is the cash bonus for the salesman. At that point in time the policies were $700, so our entrepreneur was making $375,000 pa. minus a dozen claims that may have totalled less than 20k.
Most of my towing is for flat tyres and flat batteries, neither of which are covered. Best advice for Aussies, spend $100 on Swann "Tyre & Rim" insurance.