Okay, after reading the "Terms of use" I discovered the benefit of this membership. To sum it up, depending on where you live the price you pay for the service is fixed.

BENEFITS: Tow up to 10 miles, jump start, tire change, lockout service & fuel delivery (up to 3 gallons included in service price).

COVERAGE AND BENEFIT LIMITS: $75 for a tow up to 10 miles; Additional $3 per mile after first 10 miles; $50 for other service related events (i.e. jump start, tire change, lockout service & fuel delivery (up to 3 gallons) in all 50 states for most passenger cars and light duty trucks (see below). Not available in Canada or Puerto Rico or any other country/jurisdiction outside the 50 states of the United States. Additional terms and conditions may apply.

VEHICLE ELIGIBILITY: Non-commercial use passenger automobiles and trucks not greater that 10,000 lbs. gross vehicle weight at the rates stated above. Service is available at a higher price for motorcycles, medium and heavy duty trucks and recreational vehicles.